AA Auto Answer

AAB All-to-All Broadcast

AAL Asynchronous Transfer Mode Adaption Layer

AAP Applications Access Point [DEC]

AARP AppleTalk Address Resolution Protocol

AAS All-to-All Scatter

AASP ASCII Asynchronous Support Package

AAT Average Access Time

AATP Authorized Academic Training Program [Microsoft]

ABC * Atanasoff-Berry Computer (First digital

calculating machine that used vacuum tubes)

ABEND Abnormal End

ABI Application Binary Interface

ABIOS Advanced BIOS

ABIST Automatic Built-In Self-Test [IBM]

ABLE Adaptive Battery Life Extender

ABR Available Bit Rate

ABRS Automated Book Request System [British Library]

ABS Address Book Synchronization [IBM] + Absolute

ABT Abort

ABTS ASCII Block Terminal Services

AC Autocheck + Automatic Computer + Alternating Current

ACAP Application Configuration Access Protocol

ACC Accumulator

ACCMAIL Accessing the Internet Via Email

ACD Automatic Call Distribution

ACDI Asynchronous Communications Device Interface

ACE Access Control Encryption/Entry +

Adobe Certified Expert +

Advanced Computing Environment [SCO] +

Adverse Channel Enhancements [Microcom] +

* Automatic Computing Engine

ACF Access Control Field +

Advanced Communications Function

ACH Automated Clearing House

ACIAS Automated Calibration Interval Analysis System

ACIS American Committee for Interoperable Systems

ACK Acknowledgment

ACL Access Control List

ACM Association for Computing Machinery

Audio Compression Manager [Microsoft]

ACMS Application Control Management System

ACP Ancillary Control Program + Auxiliary Control Process

ACPI Advanced Configuration and Power Interface

ACR Allowed Cell Rate

ACROSS Automated Cargo Release and Operations

Service System

ACS Access + Access Control Set + Access Control System +

* Advanced Computer System [IBM] +

Anti Curl System + Asynchronous Communication Server

ACSS Audio Cascading Style Sheets

ACTS Automated Computer Time Service

ACTT Advanced Communication and Timekeeping Technology [Seiko]

ACU Automatic Calling Unit

ACVC Ada Compiler Validation Capacity

A/D Analog to Digital

ADA Automatic Data Acquisitions +

(Programming Language named after Augusta Ada Lovelace)

ADB Apple Desk Bus

ADC Adaptive Data Compression (protocol) [Hayes] +

Add with Carry + Analog to Digital Converter

ADCCP Advanced Data Communication Control Procedures

ADD Automatic document Detection [WordPerfect]

ADF Automatic document Feeder +

Automatically Defined Function

.ADF Adapter Description File (file name extension)

ADI AutoCad/AutoDesk Device Interface (driver)

ADL Address Data Latch

ADLAT Adaptive Lattice Filter

ADLC Adaptive Lossless Data Compression [IBM] +

Asynchronous Data Link Control

ADMACS Apple document Management And Conrol System

ADMD Administrative Management Domain [X.400]

.ADN Add In Utility (file name extension)

[Lotus 1-2-3] [LDC]

ADO Active Data Objects

ADP Automatic Data Processing

ADPCM Adaptive Differential Pulse Code Modulation

ADR Address

ADS Application Development Solutions [AT&T] +

Application Development System +

Automatic Distribution System

ADSC Address Status Changed +

Adobe document Structuring Conventions

ADSI Active Directory Service Interface [Microsoft] +

Analog Display Services Interface

ADSL Asymmetric Digital Subscriber Line

ADSP AppleTalk Datastream Protocol

ADSR Attack, Decay, Sustain, Release

ADT Abstract Data Type + Application Data Types

ADU Automatic Dialing Unit

AE Above or Equal

AEB Analog Expansion Bus [Dialogic]

AEC Architecture, Engineering, Construction

AES Advanced Encryption Standard

AESA ATM End System Address

AF Auxiliary carry Flag

AFA Accelerated File Access

AFC Automatic Font Change + Automatic Frequency Control

AFD Automatic File Distribution

AFDW Active Framework for Data Warehousing [Microsoft]

AFI Authority and Format Identifier

AFII Association for Font Information Interchange

AFIRM Automated Fingerprint Image Reporting and Match

AFIS Automated Fingerprint Identification System

.AFM Adobe Font Metrics (file name extension) [Adobe Systems]

AFP Advanced Function Presentation [IBM] +

Advanced Function Printing +

Appletalk Filing Protocol [Macintosh]

AFS Andrew File System (protocols)

AFTP Anonymous File Transfer Protocol

AGA Advanced Graphics Adapter

AGC Automatic Gain Control

AGP Accelerated/Advanced Graphics Port

AGRAS Antiglare-Antireflective-Antistatic

AGU Address-Generation Unit

AHS Automated Highway Systems

AI Analog Input + Artificial Intelligence

AIA Applications Integration Architecture [DEC]

AIC AIXwindows Interface Composer [IBM]

AIF Audio Interchange Format

AIIM Association for Information and Image Management

AIM AOL Instant Messenger

AIN Advanced Intelligent Network [Bell Atlantic]

AIR Architecture Implementation Review

AIS Automated Identification System [NCIC] +

Automated Information Systems

AISB Association of Imaging Service Bureaus

AISP Association of Information Systems Professionals

AIT Advanced Intelligent Tape (drive) [Sony]

AIX Advanced Interactive Executive [IBM]

ALC Arithmetic and Logic Circuits +

Automatic Level Control

ALE Address Latch Enable +

Application Linking and Embedding

ALGOL Algorithmic Oriented Language (see IAL)

ALIBI Adaptive Location of Internetworked Bases

of Information

ALINK Active Link [HTML]

ALIWEB Archie Like Indexing in the Web [Internet]

ALN Asynchronous Learning Network

ALR Advanced Logic Research, Inc.

ALT Alternate (mode)

ALT. Alternate lifestyle [USENET Newsgroup Category]

ALU Arithmetic Logic Unit

AMA Automatic Message Accounting

AMANDDA Automated Messaging and Directory Assistance

AMASS Archival Management and Storage System

AMD Active Matrix Display + Advanced Micro Devices, Inc.

AMI Alternate Mark Inversion +

American Megatrends, Inc.

AMMA Advanced Memory Management Architecture

[Everex Systems]

AMPS Advanced Mobile Phone Service

ANCOVA Analysis of Covariance

ANDF Architecture-Neutral Distribution Format

ANI Automatic Number Identification

.ANI Animated Cursor (file name extension) [Microsoft]

ANN Artificial Neural Network

.ANN Annotations (file name extension) [IBM]

ANOVA Analysis Of Variance

ANSI American National Standards Institute

ANX Automotive Network Exchange [Chrysler/Ford/

General Motors]

AO Analog Output

AOCE Apple Open Collaboration Environment

AO/DI Always On/Dynamic ISDN

AOE Application Operating Environment [AT&T]

AOL America Online

AOS Add Or Subtract

AP Adjunct Processor + Application Processor

A/P Accounts Payable

APA Adaptive Packet Assembly +

All Points Addressable +

Arithmetic Processing Accelerator

APAR Authorized Program Analysis Report [IBM]

APAREN Address Parity Enable [IBM]

APCUG Association of PC User Groups

APDU Application Protocol Data Units

API Application Program Interface

APIC Advanced Programmable Interrupt Controller (bus) [Intel]

APIS Advanced Passenger Information System

APL * A Programming Language (Mathematics)

APM Advanced Power Management [IBM]

APNIC Asia-Pacific Network Information Center [Internet]

APOP Authenticated Post Office Protocol

.APP Application (file name extension) [R:Base]

APPC Advanced Program-to-Program Communications [IBM]

APPI Advanced Peer-to-Peer Internetworking

APPLETS Applications

APPN Advanced Peer-to-Peer Networking [IBM]

APPS Applications

APRP Adaptive Pattern Recognition Processing

APS Advanced Photo System + Advanced Printing Service [IBM]

Asynchronous Protocol Specification

APSE ADA Programming Support Environment

APT Address Pass Through +

Advanced Parallel Technology +

Automatically Programmed Tools

A/R Accounts Receivable

ARA AppleTalk Remote Access

ARAG Antireflective-Antiglare

ARAS Antireflective-Antistatic

.ARC Archive (file name extension)

ARCA Advanced RISC Computing Architecture

ARCnet Attached Resource Computer Network

.ARJ Compressed File (file name extension) [Jung]

ARL Adjusted Ring Length

ARLL Advanced Run Length Limited

ARM Advanced RISC Machine (processor) +

Annotated Reference Manual +

Asynchronous Response Mode

ARMA Association of Records Managers and Administrators

ARP Address Resolution Protocol [Novell]

ARPANET Advanced Research Projects Agency Network

ARPL Adjust Requested Privilege Level

ARTA Apple Real Time Architecture

ARTIC A Real-Time Interface Coprocessor [IBM]

ARTS Asynchronous Remote Takeover Server

.ARTS Cultural Groups (Domain Name) [Internet]

ARTT Asynchronous Remote Takeover Terminal

ARQ Automatic Repeat Request

ARU Audio Response Unit

AS Autonomous System [Internet]

ASAI Adjunct Switch Application Interface [AT&T]

ASAP As Soon As Possible +

Automatic Switching And Processing

AS3AP ANSI SQL Standard Scalable and Portable

ASB Advanced System Buffering [Intel]

.ASC ASCII text (file name extension)

ASCC * Automatic Sequence Controlled Calculator [IBM]

ASCII American Standard Code for Information Interchange

ASF Active/Advanced Streaming Format [Microsoft]

ASIC Application-Specific Integrated Circuit

ASIT Advanced Security and Identification Technology

ASL Adaptive Speed Levelling

ASLM Apple Shared Library Manager [Macintosh]

.ASM Assembler Source Language (file name extension)

ASMP Asymmetric Multprocessing

ASN Abstract Syntax Notation + Autonomous System Number

ASO Automated Systems Operations

ASP Active Server Page [Microsoft] +

Application/Authorized Service Provider +

Association of Shareware Professionals

.ASP Active Server Page (file name extension)

ASPI Advanced SCSI Programming Interface [Adaptec]

ASPS Advanced Signal Processing System

ASR Address Space Register + Automatic Send-Receive +

Automatic Speech Recognition

AST AST Research, Inc. (named from first initials of

the founders: Albert Wong, Safi Qureshey, Thomas Yuen)

AS/U Advanced Server for Unix

ASYNC Asynchronous

AS/400 Application System/400 [IBM]

AT Advanced Technology + Attention

ATAPI Advanced Technology Attachment Packet Interface

ATDP Attention Dial Pulse

ATDT Attention Dial Tone

ATE Automated Test Equipment

ATG Advanced Technology Group

ATH Attention Hang-Up (Modem command)

ATL Active Template Library

ATM Adobe Typeface Manager + Air Traffic Management +

Asynchronous Transfer Mode + Automated Teller Machine

ATPS AppleTalk Printing Services [Macintosh]

ATR Automatic Terminal Recognition

ATS Administrative Terminal System +

Apple Terminal Services

AT&T American Telephone and Telegraph

ATTN Attention

ATTRIB Attribute (also ATR)

ATX Advanced Technology Extended [Intel]

ATZ Attention Restore configuration profile from

nonvolatile RAM (Modem command)

.AU Audio (file name extension)

AUDIT Automated Data Input Terminal

AUI Attachment/Autonomous Unit Interface

AUP Acceptable Use Policy [Internet]

AUTO Automatic

AUTOEXEC Automatic Execution

AUX Auxiliary + (First Serial Port)

AV Audio/Video + Audiovisual + Authenticity Verification

AVA Audio Visual Authoring [IBM]

AVC Audio Visual Connection [IBM]

AVD Alternating Voice and Data

AVG Average

AVI Audio Visual Interleave [Microsoft]

AVR Automatic Voice Recognition

AVT Applied Voice Technology

AWE Advanced Wave Effects [Creative Lab]

AWG American Wire Gage

AWK (Unix language named after its authors...

Al Aho, Peter Weinberger and Brian Kernighan)

AWS Advanced Workstations and Systems (group) [IBM]

AWT Abstract Window Toolkit [Java]

AX Architecture Extended + Automatic Transmission

B...

BACP Bandwidth Allocation Control Protocol

BAK Binary Adaptation Kit [Microsoft]

.BAK Backup (file name extension)

BAL Basic Assembly Language

BALUN Balanced Unbalanced (device)

BAM Boyan Action Module

BAPI Business Application Programming Interface [SAP]

BARTS Bell Atlantic Regional Timesharing

.BAS Basic Language (file name extension)

BASH Bourne Again Shell [Unix]

BASIC Beginner's All-purpose Symbolic Instruction Code

BASM Built-In Assembler

BAT Block Address Translation

.BAT Batch Processing (file name extension)

BBS Bulletin Board System

BCC Block Check Character

BCC: Blind Carbon Copy

BCD Binary Coded Decimal

B-CHANNEL Bearer Channel

BCL Batch Command Language

BCN Beacon

BCP Best Current Practice + Bulk Copy Program

BCPL Basic Computer Programming Language

BCR Byte Count Register

BCS Bar Code Sorter

BDA Bios Data Area

BDC Backup Domain Controller

BDE Borland Database Engine [Borland]

BDLS Bidirectional Loop Switching

BDOS Basic Disk Operating System

BDR Bus Device Request

BDSL Broadband ADSL

BE Below or Equal

BECN Backward Explicit Congestion Notification

BEDO Burst Extended Data Out

BEL Bell

BELLCORE Bell Communications Research

BER Basic Encoding Rules + Bit Error Rate

BERT Bit Error Rate Test/Tester

BF Bad Flag

B/F Background/Foreground

.BFC Briefcase (file name extension) [Microsoft]

BFF Binary File Format [IBM]

BFT Binary File Transfer

BFTP Batch FTP

BGA Ball Grid Array

BGCOLOR Background Color [HTML]

BGE Branch if Greater or Equal

.BGI Borland Graphic Interface (file name extension)

BGP Border Gateway Protocol

BGT Branch if Greater Than

BHI Branch if Higher

BHIS Branch if Higher or Same

BI Binary Input

.BIB Bibliography (file name extension)

BiDi Bi-Directional

BIFET Bipolar Field Effect Transistor

BIFF Binary Interchange File Format

BIM Beginning of Information Marker

.BIN Binary (file name extension)

BINAC * Binary Automatic Computer

BIND Berkeley Internet Name Domain

BINHEX Binary Hexadecimal

BIOS Basic Input/Output System

BIS Business Information System

BISDN Broadband Integrated Services Digital Network

BIST Built-In Self-Test

BiSYNC (See BSYNC)

BIT Binary Digit

BITNET Because It's Time Network

BITNIC Bitnet Network Information Center

BIU Bus Interface Unit

BIW Business Intelligence Warehouse [SAP]

BIX Byte Information Exchange (BBS)

BIZ. Business [USENET Newsgroup Category]

.BK! Backup (file name extension) [WordPerfect]

.B~K Backup (file name extension)

BKSP Backspace

BL Backlit + Bit Line

BLAST Blocked Asynchronous Transmission (protocol)

[Communications Research Group]

.BLD BASIC Bload Graphics (file name extension)

BLE Branch if Less or Equal

BLER Block Error

BLK Block

BLMC Buried Logic Macrocell

BLOB Binary Large Object

BLOS Branch if Lower Or Same

BMI Branch if Minus

BMIC BusMaster Interface Controller [Intel]

BMP Basic Mapping Support + Batch Message Processing Program

.BMP Bitmap (file name extension) [Paintbrush Format]

BNC Bayonet Neill-Concelman (connector used with

coaxial cable invented by Mr. Neill-Concelman)

BNE Branch if Not Equal

BNF Backus-Naur Form (also Backus-Normal Form) [developed by

John Backus and Peter Naur]

BNS Backbone Network Service

BO Binary Output

BoB Break-out Box

BOC Basic Operator Console

BOF Beginning Of File

BOM Basic Online Memory [IBM] + Beginning Of Message

BOND Bandwidth On Demand

BOOTP Bootstrap Protocol [Internet]

BOPS Billion Operations Per Second

BORPQU Borland Pro Quattro

BORQU Borland Quattro

BOS Basic Operating System

BOT Beginning Of Table + Beginning of Tape + Robot

BP Base Pointer

BPB BIOS Parameter Block

BPDU Bridge Protocol Data Unit

BPI Bits Per Inch

BPL Branch if Plus

BPP Bits Per Pixel

BPS Bits Per Second + Bytes Per Second

BPSK Binary Phase Shift Keying

BR Bad Register

BRGC Binary Reflected Gray Code

BRI Basic Rate Interface + Brain Response Interface

BS Backspace

BSAM Basic Sequential Access Method

BSC Binary Synchronous Communication

.BSC Boyan script (file name extension) [Boyan Communications]

BSCS Bachelor of Science (Degree) in Computer Science

BSD Berkely Software/Standard Distribution

BSF Bit Scan Forward

BSI British Standards Institute

BSM Basic Storage Module [IBM]

BSP Bulk Synchronous Parallelism

BSR Bit Scan Reverse

BS-RAM Burst Static RAM

BSS Block Started by Symbol

BSV BASIC Bsave Graphics (file name extension)

BSY Busy

BSYNC Binary Synchronous Communications (protocol)

BT Bit Test

BTAM Basic Telecommunications Access Method [IBM]

BTB Branch Target Buffer

BTC Bit Test and Complement

BTOA Binary To ASCII

BTP Batch Transfer Program

BTR Bit Test and Reset

BTS Bit Test and Set

BU Branch Unit

BUBL Bulletin Board for Libraries [Janet]

BUF Buffer

BUS Broadcast and Unknown Server

BVH Base Video Handler

BWM Block-Write Mode

B2X Binary To Hexadecimal [REXX]

BYTE Binary Element String

C...

C C Programming Language

.C C source code (file name extension) [C]

CA Collision Avoidance

.CAB Cabinet (file name extension) [Microsoft]

CAD Computer Aided Design

CADD Computer Aided Design and Drafting

CADE Client/server Application Development Environment

CAE Client Application Enabler + Common Applications

Environment + Computer Aided Engineering

CAEN Chemically Assembled Electronic Nanocomputer

CAEX Computer Aided Exploration

CAG Column Address Generator

CAI Computer Aided Instruction

CAIRN Collaborative Advanced Interagency Research Network

CAL Calendar + Client Access License +

Computer Aided Learning

CALS Computer-Aided Acquisition in Logistic Support

CAM Common Access Method + Computer Aided Manufacturing +

Contents Addressable Memory

CAN Cancel

CANBUS Conroller Area Network Bus

CAP Carrierless Amplitude and Phase-Modulation +

Central Arbitration Point +

Communication Application Platform +

Competitive Access Provider +

Computer Aided Publishing

.CAP Capture (file name extension)

CAPD Computing To Assist Persons With Disabilities [Johns

Hopkins University]

CAPE Concurrent Art-to-Product Environment

CAPS Capitals (Upper Case Letters) +

Cassette Programming System

CARL Colorado Alliance of Research Libraries [Internet]

CAS Column Address Select +

Communications Application Specification +

Computer Aided Styling

CASE Computer Aided Software Engineering

CASL Crosstalk Application scripting Language [DCA]

CASS Computer Assisted Search Service

CASSIS Classified and Search Support Information System

CAT Computer Adaptive Test + Computer Aided Testing +

Computer Aided Tomography +

Computer Aided Transcription + Concatenate

.CAT Catalog (file name extension)

CATS Computer Assisted Training System

CAT SCAN Computerized Axial Tomography Scan

CATV Community Antenna Television (this was the original

name for what is now known as Cable TV)

CAU Controlled Access Unit

CAV Constant Angular Velocity

CAVE Computer Automatic Virtual Environment

CBC Cipher Block Chaining

CBCR Channel Byte Count Register

CBDS Connectionless Broadband Data Service

CBEMA Computer and Business Equipment

Manufacturers Association

CBGA Ceramic Ball Grid Array

CBI Computer Based Instruction\Instrumentation

CBL Computer Based Learning

.CBL COBOL source code (file name extension)

CBMS Computer-Based Mail System

CBR Case Based Reasoning + Constant Bit Rate

CBT Computer Based Training

CBW Convert Byte to Word

CBX Computer-Controlled Branch Exchange

CC Cluster Controller

CC: Carbon Copy

CCD Charged-Coupled Device

CCFT Cold Cathode Fluorescent Tube

CCI Common Client Interface

CCIE Cisco Certified Internetwork Expert [Cisco]

CCITT Comite Consultatif International Telegraphique et

Telephonique/ Consultative Committee for International

Telegraph and Telephone

CCL Connection/Cursor Control Language

CCP Certified Computing Professional +

Console Command Processor

CCS Common Command Set + Common Communications Services +

Common Communications Support +

Continuous Composite Servo

.CCS Color Calibration System (file name extension)

CCSD Cellular Circuit-Switched Data

CD Carrier Detect + Change Directory +

Collision Detection + Color Display + Compact Disk

C/D Control Data

C2D Character To Decimal [REXX]

CDA Compound document Architecture [DEC]

.CDA CD Audio Track (file name extension)

CDBT Compact Disk-Based Training

CDC Control Data Corporation

CD_CHRDY Card Channel Ready [IBM]

CD-DA Compact Disk -Digital Audio

CDDI Copper Distributed Data Interface

CDE Common Desk Environment + Complex Data Entry

CD-E Compact Disk - Erasable

CDF Channel Definition Format

.CDF Comma Delimited Format (file name extension)

CDFS Compact Disc File System [Microsoft]

CD+G Compact Disk plus Graphics

CD-I Compact Disk - Interactive

CDIA Certified document Imaging Architect

CDL Computer Design Language

CDMA Code Division Multiple Access

CDMF Commercial Data Masking Facility [IBM]

CD-MO Compact Disk - Magneto Optical

CDOS Concurrent Disk Operating System

CDP * Certificate In Data Processing (First certification

for Computer Professionals)

CDPD Cellular Digital Packet Data

CDR Call Detail Record + Call Detail Recording +

Common Data Representation

CD-R Compact Disk - Recordable

CDRAM Cache DRAM

CD-RDx Compact Disk - Read Only Memory Data Exchange Standard

CDRL Contract Data Requirements List

CD-ROM Compact Disk - Read Only Memory

CD-RTOS Compact Disk - Real Time Operating System

CD-RW Compact Disk - Re-Writable

CDS Current Directory Structure

CDSA Common Data Security Architecture

CDSL Consumer Digital Subscriber Line [Rockwell]

.CDT Corel Draw Template (file name extension)

CD-V Compact Disk - Video

CD-WO Compact Disk - Write Once

.CDX Compound Index (file name extension) [Fox Pro]

CD-XA Compact Disk - Extended Architecture

CE Cache Enable + Chip Enable + Collision Elimination +

Convert Enable

CEG Continuous Edge Graphics

CEI Conducted Electromagnetic Interference

CELP Card Edge Low Profile (socket) [Intel]

CEMS Constituent Electronic Mail System

CEOP Conditional End Of Page

CER Canonical Encoding Rules

CERN The Europien Particle Physics Laboratory (initials

originally from Conseil European pour la Recherche

Nucleaire)

CERT Computer Emergency Response Team

CFB Cipher Feedback + Configurable Function Block

.CFG Configuration (file name extension)

CFM Code Fragment Manager [Macintosh] +

Cubic Feet Per Minute

CFML ColdFusion Markup Language

CFR Computerized Facial Recognition

CFS Caching/Common File System

CFV Call For Votes [Bitnet]

CG Control Gate

CGA Color Graphics Adapter

CGE Common Graphics Environment

CGI Computer Generated Images + Computer Graphics Interface

CGI-BIN Common Gateway Interface - Binary

.CGM Computer Graphics Metafile (file name extension) +

Graph (file name extension) [Lotus 1-2-3] [LDC]

CGS Continuous-Grain Silicon

CHAP Challenge-Handshake Authentication Protocol

CHAR Character

CHAT Conversational Hypertext Access Technology [Internet]

CHCK Channel Check

CHCP Change Code Page

CHDIR Change Directory

CHFN Change Finger [Unix]

CHGRP Change Group

CHIPS Clearinghouse Interbank Payments System

.CHK CHKDSK (file name extension)

CHKDSK Check Disk

CHMOD Change Mode

CHOWN Change Owner

CHP Chapter

CHR Character

CHRP Common Hardware Reference Platform

CHS Cylinder Head Sector

CHTML Compressed HTML

CI Component Interface

CIA Current Instruction Address

CIAC Computer Incident Advisory Capability

CICS/VS Customer Information Control System/

Virtual Storage [IBM]

CID Charge-Injection Device +

Configuration/Installation/Distribution

CIDR Classless Inter-Domain Routing

CIF Common Interchange/Intermediate Format +

Crystallographic Information File +

Customer Information Feed

CIFS Common Internet File System

CIM Common Information Model +

CompuServe Information Manager +

Computer Integrated Manufacturing

CIO Chief Information Officer

CIOCS Communication Input/Output Control System

CIP Command Interface Port + Common Indexing Protocol

CIR Committed Information Rate

CIRC Circular Reference +

Cross-Interleaved Reed-Solomon Code

CIS Card Information Structure + Client Information System +

CompuServe Information Service +

Computer Information Systems + Contact Image Sensor +

Customer Information System

CISC Complex Instruction Set Computing

CIT Computer-Integrated Telephony

CIVR Computer and Interactive Voice Response

CIX Commercial Internet Exchange +

Compulink Information Exchange

CJLI Command Job Language Interpreter

CKD Count Key Data (device)

CLAR Channel Local Address Register

CLASS Client Access to Systems and Services +

Cooperative Library Agency for Systems and Services +

Custom Local-Area Signaling Services

CLC Clear Carry Flag

CLD Clear Direction Flag

CLEC Competitive Local Exchange Carrier

CLI Call-Level Interface + Clear Interrupt Flag +

Client Library Interface + Command Line Interface

CLIB C Library

CLID Calling Line Identification

CLIST Command List

CLK Clock

CLNP Connectionless Network Protocol

CLOS Common Lisp Object System

CLP Cell Loss Priority + Constraint Logic Programming

.CLP Clipboard (file name extension) [Windows]

CLS Clear Screen

CLSID Class Identifier

CLTP Connectionless Transport Protocol

CLTS Clear Task Switch Flag

CLTV Constant Linear Time Velocity

CLUI Command Line User Interface

CLUT Color Look-Up Table

CLV Constant Linear Velocity

CM Centimeter + Control Mark + Corrective Maintenance

CMA Concert Multi-thread Architecture

CMC Common Mail Calls + Common Messaging Calls +

Communication Management Configuration +

Complement Carry Flag +

Computer-Mediated Communication [Internet]

CMD Circuit Mode Data

.CMD Command (file name extension)

CMF Creative Music Format

CNIDR Clearinghouse for Network Information and

Discovery and Retrieval [Internet]

CMIP Common Management Information Protocol

CMIS Common Management Information Services/System

CML Chemical Markup Language + Conceptual Modelling Language +

Computer Managed Learning + Current Mode Logic

CMM Capability Maturity Model

CMMS Computerized Maintenance Management Software

CMMU Cache/Memory Management Unit [Motorola]

CMOS Complementary Metal-Oxide Semiconductor

CMOV Conditional Move

CMP Compare + Computer

CMPS Compare word String

CMS Code Management System + Compiler Monitor System +

Conversation Monitor System

CMVC Configuration Management Version Control [IBM]

CMW Compartmented Mode Workstation

CMY Cyan-Magenta-Yellow (color model)

CMYK Cyan-Magenta-Yellow-Black (color model)

CNA Certified NetWare/Network Administrator

CNAPS Co-Processing Node Architecture for Parallel Systems

CNC Computerized Numerical Control

CNE Certified NetWare Engineer

.CNF Configuration (file name extension)

CNG Calling (tone)

CNI Certified Novell Instructor [Novell]

CNIDR Clearinghouse for Networked Information and Retrieval

CNN Composite Network Node

CNR Carrier to Noise Ratio

CNSS Core Nodal Switching Subsystem [Internet]

.CNT Contents (file name extension)

CNV Conventional (pertaining to Memory)

CNVT Convert

CNX Certified Network Expert

CO Central Office + Command Output + Convert Out

COAST Card On A Stick (module)

COAX Coaxial Cable

COB Chip-On-Board

.COB COBOL source code (file name extension)

COBOL Common Business-oriented Language (See HLL)

.COD Code List (file name extension)

CODASYL * Conference on Data System Languages (Group that

designed COBOL)

CODE Client-Server Open Development Environment

CODEC Coder/Decoder + Compression/Decompression

COEM Commercial Original Equipment Manufacturer

COFF Common Object File Format [Unix]

COGO Coordinate Geometry (Programming Language)

COL Collision + Computer Oriented Language

COLD Computer Output to Laser Disk

COLL Collision

COM Component Object Model [Microsoft] +

Computer Output Microfilm

.COM Command (file name extension) +

Commercial Business (Domain Name) [Internet]

COM1 First serial Port (asynchronous port)

COM2 Second serial Port

COM3 Third serial Port

COM4 Fourth serial Port

COMDEX Computer Dealers Exposition

COMET Cornell Macintosh Terminal Emulator

COMP Compare + Communications

COMP. Computers [USENET Newsgroup Category]

COMSAT Communications Satellite Corporation

CON Console (includes Keyboard and Screen)

COND Condition

CONFIG Configuration

CONS Connection-Oriented Network Service

CONTONE Continuous Tone

COPICS Communications Oriented Production Information

and Control System [IBM]

COR Common Object Runtime

CORBA Common Object Request Broker Architecture

CoREN Corporation for Research and Enterprise Network

COS Compatible Operating System

COSE Combined Office Standard Environment +

Common Open Software/Systems Environment

COSMIC Computer Software Management and Information

Center [NASA]

COSMOS Computer System for Mainframe Operations

COSS Common Object Services Specification

COTS Commercial Off-The-Shelf

CP Copy Protected

CPA Certified Public Accountant

CPC Constant Point Calculation

CPCS Check Processing Control System [IBM]

CPE Central Processing Element +

Customer Premises Equipment +

Customer Provided Equipment

.CPE Cover Page (file name extension)

CPG Clock Pulse Generator

CPI Characters Per Inch + Clock Per Instruction +

Common Programming Interface [IBM]

.CPI Code Page Information (file name extension) [MS-DOS]

CPI-C Common Programming Interface for Communications [IBM]

CPIO Copy In and Out [Unix]

CPL Current Privilege Level

.CPL Control Panel (file name extension)

CPLD Complex Programmable Logic Device

CPM Critical Path Method

CP/M Control Program for Microcomputers [Digital Research]

CPS Characters Per Second + Cycles Per Second

CPT Command Pass Through

CPU Central Processing Unit

CPW Commercial Processing Workload [IBM]

CR Carriage Return

CRAM Cyberspatial Reality Advancement Movement

CRAYON Create Your Own Newspaper

CRC Cyclic Redundancy Check

.CRD Cardfile (file name extension) +

Chord (music file name extension)

CREN Computer Research Education Network +

Corporation for Research and Education Networking

CRF Cable Retransmission Facility + Cross Reference File

CRI Color Reproduction Indices

CR/LF Carriage Return/Line Feed

CRM Customer Relationship Management

CROM Control Read Only Memory

CRT Cathode Ray Tube

CRTC CRT Controller

CRUD Create, Retrieve, Update, Delete

CS Chip Select + Clear to Send + Code Segment

C/S Client/Server

CSA Calendaring and Scheduling API [IBM]

CSAR Channel System Address Register

CSCW Computer Supported Cooperative Work

CSD Circuit-Switched Data +

Computer Services Department +

Corrective Service Diskette [IBM]

CSDS Circuit Switched Data Service

CSE Certified System Engineer

CSFI Communication Subsystem For Interconnection

CSG Constructive Solid Geometry +

Consulting Services Group [Lotus]

CSI Command Sequence Introducer + CompuServe Incorporated

CSID Call Subscriber ID

CSL Computer Sensitive Language

CSLIP Compressed Serial Line Interface Protocol [Internet]

CSM Code Set Map (file) + Communications Services Manager

CSMA/CA Carrier Sense Multiple Access/with Collision Avoidance

CSMA/CD Carrier Sense Multiple Access/with Collision Detection

CSMS Customer Support Management System

CSN Card-Select Number

CSNET Computer Science Network

CSO Central Services Organization

CSP Certified Systems Professional +

Chip-Scale Packaging +

Commercial Service Provider +

Commercial Subroutine Package +

CompuCom Speed Protocol [CompuCom] +

Communicating Sequential Processes +

Cross System Product [IBM]

CSPDN Circuit Switched Public Data Network

CSRAM Custom Static RAM

CSS * Continuous System Simulator (Language)

CSS Cascading Style Sheet [Microsoft] +

Contact Start-S

CSSM Client-Server Systems Management [IBM]

CS/SS Card Service/Socket Service

CSTA Computer-Supported Telephony Applications

CSU Channel Service/Switching Unit

CSV Circuit-Switched Voice +

Comma-Separated value/Variable +

Common Services Verbs (interface) [Microsoft]

C&T Chips and Technologies

CTB Cipher Type Byte

CTC Channel To Channel

CTCP Client-To-Client Protocol

CTI Computer-Telephony Integration

CTOS Computerized Tomography Operating System +

Convergent Technologies Operating System

CTPA Coax-to-Twisted-Pair Adapter

CTRCO * Calculating,Tabulating,Recording Company (The name of

this company was changed to "International Business

Machines" by Thomas J. Watson, Sr.)

CTRL Control

CTS Clear To Send + Computer Telephony Solution [IBM] +

Customer Telephone System

CTSS * Compatible Time Sharing System

CUA Common User Access [IBM]

CUB Cursor Backward

CUD Cursor Down

CUE Custom Updates and Extras (card) [Egghead Software]

CUF Cursor Forward

CUI Character-Oriented User Interface +

Common User Interface [IBM]

CUP Cursor Position

CUPID Completely Universal Processor I/O Design [AST]

.CUR Cursor (file name extension)

CUSIP Committee for Uniform Security Identification

Procedures [U.S. Treasury]

CUT Control Unit Terminal

CUTE Clarkston University Terminal Emulator

CUU Cursor Up

CVF Compressed Volume File

CVGA Color Video Graphics Array

CVIA Computer Virus Industry Association

CVT Convert

CVW CodeView for Windows

CWD Convert Word to Double Word +

Change Working Directory [Internet]

CWIS Campus Wide Information Service/System [Internet] +

Community Wide Information Service/System [Internet]

C2X Character To Hexadecimal [REXX]

CYL Cylinder

CYMK Cyan-Yellow-Magenta-Black (color model)

D...

D/A Digital to Analog

DAA Data Access Arrangement +

Decimal Adjust for Addition

DAB Digital Audio Broadcasting

DAC Data Acquisition and Control +

Digital to Analog Converter +

Dual Attachment Concentrator

DACL Discretionary Access Control List

DAD Desk Application Director [Borland]

DAE Digital Audio Extraction

DAI Distributed Artificial Intelligence

DAL Data Access Language [Apple Computer] +

Disk Access Lockout

DAM Data Acquisition and Monitoring

DAMPS Digital AMPS

DAO Data Access Object [Microsoft]

DAP Data Access Protocol [DEC] +

Developer Assistance Program

DAPIE Developers Application Programming Interface Extensions

DARI Database Application Remote Interface [IBM]

DARMS Digital Alternate Realization of Musical Symbols

DART Digital Audio Reconstruction Technology

DAS Decimal Adjust for Subtraction +

Dual-Attached Station

DASD Direct Access Storage Device [IBM]

DAT Digital Audio Tape + Disk Array Technology

.DAT Data (file name extension)

DATACOM Data Communications

DAV Digital Audio-Video

DAVIC Digital Audio-Visual Council

dB Decibel

DB Data Base + Data Buffer + Device Bay

dBA Adjusted Decibel

DBC Device Bay Controller

DBCS Delivery Bar Code Sorter + Double-Byte Character Set

.DBF Database (file name extension)

DBIS Dun & Bradstreet Information Services

DBM Data Base Manager

DBMS Data Base Management System

DBR DOS Boot Record

DBS Data Base Server +

Direct (to home) Broadcast (satellite) System

DBV Digital Broadcast Video

DB2 Database 2

DC Data Collection + Data Communication + Data Control +

Device Control + Direct Current

D2C Decimal To Character [REXX]

DCA Digital Communications Associates +

document Content Architecture [IBM]

DCAF Distributed Console Access Facility [IBM]

DCAM Digital Camera + Direct Chip Attach Module

DCB Device Control Block + Disk Coprocessor Board [Novell]

DCC Data Country Code + Digital Command Control +

Digital Compact Cassette + Direct Cable/Client Connection

+ Display Combination Code

DCD Data Carrier Detect

DCE Data Circuit-Terminating Equipment +

Data Communications Equipment +

Distributed Computing Environment [OSF] +

Distributed Computing Equipment

DCED Distributed Computing Environment Daemon

DCF Data Communication Facility [IBM] +

Data Compression Facility +

Data Count Field [IBM] +

Driver Configuration File [Lotus]

D-CHANNEL Data Channel

DCI Display Control Interface

DCL Data Control Language + Declaration +

DEC Command Language [DEC] +

Device Clear + Digital Control Logic +

Digital Command Language [Digital]

DCOM Distributed Component Object Model

DCP Digital Light Processing [TI]

DCS Data Collection System + Data Control System +

Desk Color Separation + Distributed Control System

DCT Discrete Cosine Transform

.DCT Dictionary (file name extension)

DCU Data-Cache Unit

DD Day + Digital Display + Double Density

DDA Distributed Data Access + Domain-Defined Attribute

DDB Device Dependent Bitmap + Device Descriptor Block

DDC Digital Data Channel [VESA] + Display Data Channel

DDCMP Digital Data Communications Message Protocol [DEC]

DDC1 Display Data Channel One

DDCS Distributed Database Connection Services [IBM]

DDD Data Definition Language + Direct Distance Dialing

DDE Direct Data Entry + Dynamic Data Exchange [Microsoft]

DDEML Dynamic Data Exchange Manager Library [Microsoft]

DDF Display Data Channel + Dynamic Data Formatting [IBM]

DDI Device Driver Interface +

Digital document Interchange + Direct Dial In

DDK Device Driver Kit [Microsoft Windows]

DDL Data Definition Language + Data Description Language

DDM Distributed Data Management

DDN Defense Data Network

DDNS Dynamic Domain Naming System

DDP Datagram Delivery Protocol +

Distributed Data Processing

DDR Dynamic document Review [Symantec]

DDR-SDRAM Double Data Rate-SDRAM

DDS Data Description Specification +

Digital Dataphone Service [AT&T] + Design Data Sheet +

Digital Data Storage + Distributed Database Services

DDX Digital Data Exchange

DE Device End

DEA Data Encryption Algorithm

DEC Decrement + Device Clear + Digital Equipment Corporation

DECNET Digital Equipment Corporation Networking (protocol)

DEF Desk Functional Equivalent [Compaq]

.DEF Definitions + Defaults (file name extensions)

DEFRAG Defragment

DEK Data Encryption Key

DEL Delete

DELSTR Delete String [REXX]

.DEM Demonstration (file name extension)

DEN document Enabled Networking [Novell-Xerox]

DER Distinguished Encoding Rules

DES Data Encryption Standard + Data Entry Sheet

.DES Description (file name extension)

DET Device Execute Trigger

DEV Device

DF Data Field + Destination Field + Device Flag +

Double Flag

DFC Data Flow Control

DFDR Digital Flight Data Recorder

DFM Design For Manufacturability [IBM]

DFP Digital Flat Panel

DFS Distributed File System

DFSMS Data Facility Storage Management Subsystem [IBM]

DFT Design For Testability + Diagnostic Function Test +

Discrete Fourier Transform +

Distributed Function Terminal

DFU Data File Utility

DGIS Direct Graphics Interface Standard

DHCP Dynamic Host Configuration Protocol

DHL Dynamic Head Loading

.DHP Dr. Halo PIC (file name extension)

DHTML Dynamic HTML

DI Data In + Destination Index

DIA document Interchange Architecture [IBM]

DIB Device Independent Bitmap +

Directory Information Base +

Dual Independent Bus [Intel]

DIBOL DEC Business Oriented Language

.DIC Dictionary (file name extension)

DID Direct Inward Dialing

DIDS Distributed Intrusion Detection System

DIF Data Interchange Format

DIFFSENS Differential Sense

DIIP Direct Interrupt Identification Port

DIMM Dual In-Line Memory Module

DIN Deutsche Industrie Norm (German equivalent of EIA)

DIO Data Input-Output

DIP Dialup Internet Protocol [Internet] +

Digital Imaging Processing +

Dual In-line Package + Dual In-line Pin

DIR Directory (file)

DIS Draft International Standard +

Dynamic Impedance Stabilization [CompuCom]

DISA Data Interchange Standards Association +

Direct Inward System Access

DISP Displacement (offset)

DIT Directory Information Tree

DIV Divide

DIVE Direct Interface Video Extension [OS/2 Warp]

DIVX Digital Video Express

DIW D-Inside Wire [AT&T]

.DIZ Description In Zip (file name extension)

DL Download (also D/L)

DL/1 Data Manipulation Language 1 [IBM]

DLC Data Link Control (protocol) [IBM] +

Distributed Loop Carrier

DLCI Data Link Connection Identifier

DLD Display List Driver

DLE Data Link Escape

DLL Dynamic Link Library

DLM Distributed Lock Manager + Dynamic Link Module

DLP Digital Light Processing [TI]

DLR DOS LAN Requester

DLS Data Link Switching [IBM]

DLT Digital Linear Tape

DM Distributed Memory

DMA Direct Memory Access/Addressing +

document Management Alliance

DMAC DMA Controller

DMACS Distributed Manufacturing Automation & Control Software

DMD Digital Micromirror Device [TI]

DME Direct Memory Execution +

Distributed Management Environment

DMF Distribution Media Format [Microsoft]

DMI Desk Management Interface

DML Data Manipulation Language

DMM Digital Multimeter

DMMS Dynamic Memory Management System

DMOS Double-diffused Metal-Oxide Semiconductor

DMP Dot Matrix Printer

DMPC Distributed Memory Parallel Computer

DMPP Distributed Memory Parallel Processor

DMQS Display Mode Query and Set [IBM]

DMS Data Management Software + Data/document

Management System

DMSD Digital Multistandard Decoding

DMSS Distributed Mass Storage System

DMT Digital/Discrete Multi-Tone

DMTF Desk Management Task Force

DMY Day Month Year

DN Down

DNC Direct Numerical Control

DNIC Data Network Identification Code

DNIS Dialed Number Identification Service

DNS Domain Naming System

DO Data Out + Distributed Objects

.DOC document + documentation (file name extensions)

DOCSV Data Over Circuit-Switched Voice

DOE Distributed Objects Everywhere

DOIP Dial Other Internet Providers [IBM]

DO-IT Disabilities, Opportunities, Internetworking and

Technology

DOM document Object Model

DOMF Distributed Object Management Facility

DOS Disk Operating System

DOSEM DOS Emulation

DOV Data Over Voice

DOW Day Of Week

DP Data Processing

DPA Demand Protocol Architecture [3Com] +

document Printing Architecture

DPAM Demand Priority Access Method

DPAREN Data Parity Enable [IBM]

DPB Drive Parameter Block

DPC Direct Program Control

DPI Distributed Protocol Interface + Dots Per Inch

DPL Descriptor Privilege Level

DPM Digital Panel Meter

DPMA Data Processing Management Association

DPMI DOS Protected Mode Interface [Microsoft]

DPMS Display Power Management Support

DPO Data Phase Optimization

DPS document Processing System

DPSK Differential Phase Shift Keying

DPtoTP Display Coordinates to Tablet Coordinates

(converting)

DQDB Distributed Queue Dual Bus

DQL Data Query Language

DR Data Received

D/R Direct or Reverse

DRAM Dynamic Random Access Memory

DRAW Direct Read After Write

DR.BOND Dial-up Router Bandwidth On Demand [NEC]

DRDA Distributed Relational Database

Algorithm/Architecture [IBM]

DR-DOS Digital Research-Disk Operating System

, DRDW Direct Read During Write

DRI Digital Research Incorporated

DRM Distributed Resource Management

DRO Data Request Output + Destructive Read-Out

DRS document Registration System

.DRS Driver Resource (file name extension) [WordPerfect]

DRV Drive

.DRV Device Driver (file name extension) (Also see .DVR)

.DRW Draw + Drawing (file name extensions)

DS Data Segment + Data Send + Data Server + Double Sided

D/S Dhrystone Per Second

DSA Digital Signature Algorithm + Directory System Agent

DSAP Destination Service Access Point

DSD Direct Stream Digital [Sony-Philips]

DSDD Double Sided, Double Density (diskette)

DSE Data Storage Equipment

DSEA Display Station Emulation Adapter

DSECT Dummy Control Section

DSHD Double Sided, High Density (diskette)

DSIS Distributed Support Information Standard

DSL Digital Subscriber Line +

Dynamic Simulation Language

DSLAM Digital Subscriber Line Access Multiplexer

DSM Distributed Shared Memory

DSMA Digital Sense Multiple Access

DSN Delivery Service Notification

DSOM Distributed System Object Model

DSP Digital Signal Processing/Processor +

Directory Synchronization Protocol [Lotus]

DSPT Display Station Pass-Thru [IBM]

DSQD Double Sided, Quad Density (diskette)

DSR Data Set Ready + Device Status Register +

Device Status Report

DSS Decision Support System + Digital Signature Standard +

Direct Station Selector

DSSI Digital Standard Systems Interconnect [DEC]

DSSS Direct-Sequencing Spread Spectrum

DSSSL document Style Semantics and Specifications Language

DSTN Double Supertwisted Nematic

DSU Data Service/Switching Unit + Digital Service Unit

DSVD Digital Simultaneous Voice and Data

DSW Data Status Word + Device Status Word

DSX Digital Signals Cross-Connect

D2T2 Dye Diffusion Thermal Transfer (printing)

DTA Disk Transfer Area

.DTA Data (file name extension)

DTC Desk Conferencing

DTD document Type Definition

DTE Data Terminal Equipment + Dumb Terminal Emulator

DTF Distributed Test Facility

DTL Dialogue Tag Language [IBM] + Diode-Transistor Logic

DTM Digital Terrain Mapping

DTMF Data Tone Multiple Frequency + Dual Tone Multifrequency

DTP Desk Publishing + Distributed Transaction Process

DTR Data Terminal Ready + Data Transfer Rate

DTSS Dartmouth Time Sharing System

DTV Desk Video + Digital Television

DTVC Desk Video Conferencing

DU Disk Usage

DUA Directory User Agent

DUAT Direct User Access Terminal

DUN Dial-Up Networking [Microsoft]

DUNCE Dial Up Network Connection Enhancement

DV Digital Video

.DV DESQview script (file name extension)

DVC Desk Video Conferencing + Digital Video Camera

DVD Digital Video Disk

DVD-R Digital Video Disk-Recordable

DVD-RAM Digital Versatile Disc-RAM

DVD-ROM Digital Versatile Disc-ROM

DVE Digital Video Effect

DVI Digital Video Interactive + Digital Visual Interface

.DVI Device Independent (file name extension)

DVM Digital Volt Meter

DVMRP Distance Vector Multicast Routing Protocol [Internet]

DVR Digital Video Recorder

.DVR Device Driver (file name extension) (Also see .DRV)

DW Data Warehousing

DWDM Dense Wavelength Division Multiplexer

DWG Drawing

DWMT Discrete Wavelet Multitone

D2X Decimal To Hexadecimal [REXX]

.DXB Drawing Interchange Binary (file name extension)

[AutoCAD]

DXC Data Exchange Control

DXF Drawing Exchange Format

DXI Data Exchange Interface

DYNSRC Dynamic Source

E...

EA Effective Address + Extended Attribute [OS/2]

EAR External Access Register

EARN European Academic Research Network

EAROM Electrically Alterable Read Only Memory

EARS Electronic Access to Reference Services +

Electronic Authoring and Routing System [DEC] +

Explicit Archive and Retrieval System [Langley Research]

EATA Enhanced AT Bus Attachment

EAX Environmental Audio Extensions [Creative]

EB Exabyte (1,024 petabytes)

(One Billion Billion characters of information)

EBC EISA Bus Controller

EBCT Electron Beam Computed Tomography

EBCDIC Extended Binary Coded Decimal Interchange Code [IBM]

EBI Equivalent Background Input +

Extended Background Investigation

EBNF Extended Backus-Naur Form

EBT Electronic Benefits Transfer

EC Electronic Commerce + Error Control

ECAL Enjoy Computing And Learn

ECAT Electronic Card Assembly and Test [IBM]

ECB Electronic Codebook + Event Control Block

ECC Elliptic Curve Crypto + Error Check Code +

Error Checking and Correction + Error Correction Code

ECD Enhanced Color Display + Enhanced Compact Disk

ECHO European Commission Host Organization [Internet]

ECI External Call Interface

ECL Emitter Coupled Logic

ECM Electronic Control Module

ECMA European Computer Manufacturers Association

ECNE Enterprise Certified NetWare Engineer [Novell]

ECP Enhanced/Extended Capabilities Port [Microsoft]

ECS Enhanced Chip Set

ECTL Electronic Communal Temporal Lobe

ECU EISA Configuration Utility

ED Erase Display

EDA Electronic Design Automation +

Embedded document Architecture [Go Corporation]

EDB Embedded Database

EDC Electronic Digital Computer +

Enhanced Data Correction +

Error Detection and Correction

EDDC Extended Distance Data Cable

EDE Encrypt-Decrypt-Encrypt

EDGAR Electronic Data Gathering, Analysis and Retrieval

EDI Electronic Data Interchange +

Electronic document Interchange [DEC]

EDIF Electronic Design Interchange Format

EDIFACT EDI for Administration Commerce and Transport

EDL Edit Decision List

EDLC Ethernet Data Link Control

EDLIN Editor (Line Text)

EDMS Electronic document Management System

EDO Extended Data Out

EDOS Enhanced DOS for Windows

EDP Electronic Data Processing

EDPM Electronic Data Processing Machine

EDRAM Eraseable/Extended Dynamic Random Access Memory

EDS Electronic Data Systems (corporation)

EDSAC * Electronic Delay Storage Automatic Computer

.EDU Educational Institutions (Domain Name) [Internet]

EDVAC * Electronic Discrete Variable Automatic Computer

(First stored-program digital computer)

EE Extended Edition [IBM]

EEC Extended Error Correction

EEG Electroencephalogram

EEL Epsilon Extension Language

EEM Extended Memory Management

EEMAC Electrical & Electronic Manufacturers of Canada

EEMS Enhanced Expanded Memory Specification

EEPROM Electrically Erasable Programmable Read-Only Memory

EES Escrow Encryption Standard

EFA Extended File Attribute

EFF Electronic Frontier Foundation

EFI Electromechanical Frequency Interference +

Electronics For Imaging

EFIGS English, French, Italian, German, Spanish

EFL Emitter Follower Logic

E-FORM Electronic Form

EFS Encrypting File System

EFTS Electronic Funds Transfer System

EGA Enhanced Graphics Adapter

EGP Exterior Gateway Protocol

EGREP Extended Global Regular Expression Print [Unix]

EHLLAPI Emulator High Level Language Application

Programming Interface [IBM]

EIA Electronic Industries Association

EIDE Enhanced Integrated Drive Electronics

EIS Executive Information System

EISA Extended Industry Standard Architecture

EJB Enterprise JavaBeans

EL Electroluminescent (display) + Erase Line

ELAN Emulated Local Area Network

ELC Embedded Linking and Control

ELF Executable and Linking Format +

Extremely Low Frequency

ELS Entry Level System

EM Electronic Mail + Emphasized + End of Medium +

Expanded Memory

EMA Electronic Mail Association +

Enterprise Management Architecture

EMACS Editing Macros [Unix]

E-MAIL Electronic Mail

EMB Extended Memory Block [LIM/AST]

EMBARC Electronic Mail Broadcast to a Roaming Computer

[Motorola]

EMC Electromagnetic Compatibility + Enhanced Memory Chip +

E-Mail Connection + Extended Math Coprocessor

EMCC * Eckert-Mauchly Computer Company (World's first computer

company, founded by Presper Eckart and John Mauchly,

who invented and built the first UNIVAC)

EMI Electromagnetic Interference

.EML Electronic Mail (file name extension)

EMM Expanded Memory Manager

EMR Electro-Magnetic Radiation +

Enhanced Metafile Record

EMS Electronic Mail System + Electronic Message Service +

Expanded Memory Specification [LIM]

EMSAPI Extended Messaging Services Application

Programming Interface

EMWAC European Microsoft Windows NT Academic Centre

.ENC Encoded (file name extension)

ENDEC Encoder/Decoder

ENDS Ends Segment

ENIAC * Electronic Numerical Integrator Analyzer and

Computer (First fully electronic digital computer)

ENQ Enquiry

ENSS Exterior Nodal Switching Subsystem [Internet]

EOA End Of Address

EOB End Of Block

EOC End Of Conversion

EOF End Of File + Enterprise Objects Framework

[Next Computer]

EOI End Of Interrupt + End Or Identify

EOJ End Of Job

EOL End Of Line + End Of List

EOM End Of Message

EOR Exclusive OR (Also XOR)

EOS Earth Observing System [NASA] + End Of String

EOSDIS Earth Observing System Data and Information System [NASA]

EOT End Of Table + End Of Tape (marker) + End Of Text +

End Of Transmission

EP Electrophotographic Engine

EPIC Explicitly Parallel Instruction Computing

EPL Effective Privilege Level

EPLD Electrically Programmable Logic Device

EPM Enhanced Editor for Presentation Manager [IBM] +

Enterprise Process Management [IBM]

EPP Enhanced Parallel Port

EPROCESS Executive Process

EPROM Electrically Programmable Read Only Memory +

Erasable Programmable Read Only Memory

.EPS Encapsulated Postscript (file name extension)

EPSF Encapsulated Postscript Files

ERA Extended Registry Attributes

ERAS Electronic Routing and Approval System [Hughes Aircraft]

ERD Emergency Repair Disk

ERIC Educational Resources Information Center [Internet]

ERLL Enhanced Run Length Limited

ERMA * Electronic Recording Method, Accounting

[General Electric]

EROM Erasable Read Only Memory

EROS Earth Resources Observation System

[U.S. Geological Survey]

ERP Enterprise Resource Planning

ERR Error

ER/RC Extended Result/Response Code

ERU Emergency Recovery Utility [Microsoft]

ES Extra Segment

ESA Enterprise Systems Architecture [IBM] +

European Space Agency

ESC EISA System Component + Escape

ESCD Extended System Configuration Data

ESCM Extended Services Communications Manager [IBM]

ESCON Enterprise System Connection (Architecture) [IBM]

ESC/P Epson Standard Code for Printers

ESD Electronic Software Distribution +

Electrostatic Discharge

ESDI Enhanced Small/System Device Interface

ESDRAM Enhanced SDRAM

ESF Extended Superframe

ESI End System Identifier +

Enhanced Serial Interface (specification) [Hayes]

ESMR Enhanced Specialized Mobile Radio

ESN Electronic Security Number

ESP Emulation Sensing Processor +

Encapsulating Security Payload (header) +

Enhanced Serial Port [Hayes] + Enhanced Service Provider +

Estimated Selling Price

ESR Event Service Routine

ESS Electronic Switching System

ESU Electro-Static Unit

ET Enhancement Technology

ETACS Extended Total Access Communication System [IBM]

ETANN Electrically Trainable Analog Neural

Network (chip) [Intel]

ETB End of Transmission Block

ETC Electronic Toll Collection +

Enhanced Throughput Cellular (modem protocol) [AT&T]

ETF Enriched Text Format

ETOM Electron-Trapping Optical Memory

ETPL Endorsed Tempest Products List

ETS Econometric Time Series

ETX End Of Text

EU Execution Unit

EUC End User Computing + Extended Unix Code [IBM]

EUDORA (Named after author of story:

"Why I Live at the P.O.", Ms. Eudora Welty)

EUI End-User Interface

EVE Extensible VAX Editor

EVGA Extended Video Graphics Array +

Extended Video Graphics Adapter

EWAN Emulator Without A Good Name [Internet]

EWS Employee Written Software [IBM]

ExCA Exchangeable Card Architecture [Intel]

.EXE Executable (file name extension)

EXE2BIN Program used to convert an (.EXE) file to binary

format (.COM) file

EXM Enterprise Messaging Exchange [Lotus]

EXP Exponent

EXT External

EXTRN External Reference

E-ZINE Electronic Magazine

F...

FAB Computer-Chip Fabrication Plant

FAC File Access Code

FAMOS Floating Gate Avalanche MOS

FANS Future Air Navigation System

FAP File Access Protocol

FAPI Family Application Program Interface

FAQ Frequently Asked Question

FARNET Federation of American Research Networks [Internet]

FASIC Function and Algorithm-Specific Integrated Circuit

FAT File Allocation Table

FAX Facsimile

.FAX Fax (file name extension)

FC/AL Fiber Channel/Arbitrated Loop

FCB File Control Block

FCC Federal Communications Commission

FCC: File Carbon Copy

FCCSET Federal Coordinating Council for

Science, Engineering and Technology

FC/EL Fiber Channel/Enhanced Loop

FCI Flux Changes per Inch

FCL Fibre Channel Loop

FCR FIFO Control Register

FCS Fiber Channel Standard + Frame Check Sequence

FD Floppy Disk + Floppy Drive + Full Duplex

FDC Floppy Disk Controller

FDDI Fiber Digital Device Interface +

Fiber Distributed Data Interface

FDISK Fixed Disk

FDM Frequency Division Multiplexing

FDMA Frequency Division Multiple Access

FDX Full Duplex

FEC Forward Error Correction

FECN Forward Explicit Congestion Notification

FED Field Emission/Emitter Display

FEFO First-Ended, First-Out

FEP Front End Processor

FEPI Front End Programming Interface

FEPROM Flash EPROM

FeRAM Ferroelectric RAM

FESDK Far East Software Development Kit [Microsoft]

FET Field Effect Transistor

FF Flip-Flop + Form Feed

FFDC First Failure Data Capture [IBM]

FFS Fast File System

FFST First Failure Support Technology [IBM]

FFT Fast Fourier Transform + Final Form Text [IBM]

FG Floating Gate

FGREP Fixed Global Regular Expression Print [Unix]

FHS Fan Heat-Sink

FHSS Frequency-Hopping Spread Spectrum

FIF Fractal Image Format

FIFO First-In, First-Out

FILO First-In, Last-Out

FIP File Processor Buffering

FIPS Federal Information Processing Standard

FIR Fast Infrared + Finite Impulse Response

.FIRM Business or Firm (Domain Name) [Internet]

FIRST Forum of Incident Response and Security Teams

FIU Fingerprint Identification Unit [Sony]

FIX Federal Internet Exchange

FLA Four Letter Acronym

FLC Ferro-electric Liquid Crystal

FLD Field

FLL FoxPro Link Library [Microsoft Fox Pro]

FLOPS Floating Point Operations Per Second

.FLR Folder (file name extension)

FMS Forms Management System

FMT Format

FMV Full Motion Video

FNT Font

FOCUS Forum of Control Data Users

FOD Fax On Demand

FOG First Osborne Group

FOIP Fax Over Internet Protocol

FOIRL Fiber Optic Inter Repeater Link [IEEE]

FOLDOC Free On-Line Dictionary Of Computing

.FON Font + Phone + Phone Directory (all file name

extensions)

.FOR Fortran source code (file name extension)

FORTH (Programming Language)(See HLL)

FORTRAN Formula Translator (Programming Language)(See HLL)

FOSE Federal Office Systems Exposition

FOSI Format Option Specification Instance

FOSSIL Fido/Opus/Seadog Standard Interface Layer

FPC Floating Point Calculation

FPCE Floating-Point C Extension (specification)

FPGA Field Programmable Gate-Array

FPLA Field Programmable Logic-Array

FPM Fast Page Mode

FPP Fixed Path Protocol + Floating Point Processor

FPR Floating-Point Register

FPS Favorite Picture Selection + Frames Per Second

FPT Forced Perfect Termination

FPU Floating Point Unit

FQDN Fully Qualified Domain Name [Internet]

FRAD Frame Relay Access Device +

Frame Relay Assembler/Disassembler

FRAG Fragment + Fragmentation

FRAM Ferroelectric Random-Access Memory

FRC Functional Redundancy Checking

FRED Frame Editor + Front-End to Dish

FRPI Flux Reversals Per Inch

.FRS WordPerfect Graphics Driver (file name extension)

FS File Separator

FSB Front Side Bus

FSD File System Driver [OS/2]

FSE Full Screen Editor

FSF Free Software Foundation [Internet]

FSK Frequency Shift Keying

FSN Full Service Network

FSP File Service Protocol

FSR Free System Resources

FST Flat Square Tube (monitor)

F/T Full Time

FTAM File Transfer, Access and Management +

File Transfer and Access Method

FTL Flash Transition Layer [Intel]

FTM Flat Tension Mask [Zenith]

FTP File Transfer Protocol [Internet]

FTPD File Transfer Protocol Daemon

FTTC Fiber To The Curb

FTS Federal Telecommunication System

FTX Fault Tolerant Unix

FUI File Update Information

FUNC Function

FVT Full Video Translation

FYI For Your Information

G...

GA General Availability

GAAP Generally Accepted Accounting Principles

GAL Generic Array Logic

GAPI Gateway Application Programming Interface

GART Graphics Address Relocation Table

GATT Graphics Address Translation Table

Gb Gigabit (1,024 megabits) +

(One Billion Bits of Information)

GB Gigabyte (1,024 megabytes) +

(One Billion Characters of Information)

GCC GNU C-Compiler [Unix]

GCCD Glass-Passivated Ceramic Chip Diode

GCR Group Code Recording

GDA Global Data Area

GDDM Graphics Data Display Manager

GDG Generation Data Group [IBM]

GDI Graphical Device Interface

GDLC Generic Data Link Control [IBM]

GDP Graphic Draw Primitive

GDT Geometric Dimensioning and Tolerancing +

Global Descriptor Table +

Graphics Development Toolkit

GECOS General Electric Comprehensive Operating System

GEIS General Electric Information Service (company)

GEM Graphics Environment Manager (DRI Program)

GENIE General Electric Network for

Information Exchange

GEO Geostationary Earth Orbit

GEOS Graphic Environment Operating System [Geoworks]

GET Get Execute Trigger

GFI General Format Identifier + Ground-Fault Interceptor

GGP Gateway-Gateway Protocol [Internet]

GHZ Gigahertz

.GID ics (file name extension) [Microsoft]

.GIF Graphics Interchange Format (file name extension)

GIGO Garbage In, Garbage Out

GII Global Information Infrastructure

GILS Government Information Locator Service

GIMPS Great Internet Mersenne Prime Search

GINA Graphical Identification and Authentication

GIS Geographic Information System +

Global Information Solutions [AT&T]

GIX Global Internet Exchange [Internet]

GKS Graphical Kernel System

GL Graphics Language

G/L General Ledger

GLIS Global Land Information System [US Geological Survey]

GLM General Linear Models

GLOBE Global Learning by Observations to Benefit

the Environment [Internet]

.GLY Glossary (file name extension) [Microsoft Word]

GML Generalized Markup Language

GMP Global Mobile Professional

GMR Giant Magneto-Resistive (read head technology)

GMS Global Management System +

Global Messaging Service [Novell]

GMT Greenwich Mean Time

GND Ground (signal/system)

GNN Global Network Navigator

GNU Gnu's Not Unix (operating system)

GNOME GNU Network Object Model Environment

GOSIP Government Open Systems Interconnection Profile

.GOV Governmental (Domain Name) [Internet]

GP Gas Plasma + General Purpose

GPF General Protection Fault

GPI Graphics Programming Interface

GPIB General Purpose Information/Interface Bus

GPR General Purpose Register [IBM]

GPRC Glass Passivated Rectifier Chip

GPS Global Positioning Satellite/System +

Global Product Specification

GPSS * General Purpose Systems Simulator (language)

GPU Graphics Processing Unit

GRADD Graphics Adapter Device Driver [IBM]

GRE Graphics Engine

GREP Global Regular Expression Print

.GRF Graph (file name extension)

.GRP Group (file name extension)

GS Group Separator

GSI General Server Interface

GSM Global Shared Memory +

Global System for Mobile-Communications (network)

GSNW Gateway Service for NetWare [Microsoft]

GSP Generic Server Passer + Global Service Provider

GSTN General Switched Telephone Network

GTE General Telephone Electronics (corporation)

GTF Generalized Timing Format

GTL Gunning Transceiver Logic

GTO Guide To Operations [IBM]

GTP * Geometry Theorem Prover

GUI Graphical User Interface

GUID Globally Unique Identifier +

Global Universal Identifier

GVT Global Virtual Time

GW-BASIC Gee Whiz BASIC

.gz Compressed file (compressed filename extension -

using GNU gzip compression/decompression program) [Unix]

GZIP GNU Zip

H...

.H Header (file name extension) [C]

HACMP High Availability Cluster Multi-Processing [IBM]

HAL Hard Array Logic + Hardware Abstraction Layer +

House-Programmed Array Logic

HAL * Heuristically Programmed Algorithmic (computer)

[from 1968 movie "2001: A Space Odyssey"]

HAP Host Access Protocol

HASP Houston Automatic Spooling Priority (System)

HBA Host Bus Adapter

HCL Hardware Compatibility List

HCSS High Capacity Storage System

HCU Home Computer User

HD Hard Disk + High Density

HDA Head Disk Assembly

HDCD High Definition Compatible Digital

HDF Hierarchical Data Format [NCSA]

HDI Head to Disk Interference

HDL Hardware Description Language

HDLC High-Level Data Link Control

HDM Hardware Device Module

HDML Handheld Device Markup Language

HDR Header

HDSC High Density Signal Carrier [DEC]

HDSL High-Data-Rate Digital Subscriber Line

HDSS Holographic Data Storage System

HDT Host Digital Terminal

HDTV High Definition Television

HDVD High Definition Volumetric Display

HDW Hardware

HDX Half Duplex

HERC Hercules

HEX Hexadecimal

HFC Hybrid Fiber-Coaxial

HFS Hierarchical File System [Macintosh]

HFT High Function Terminal [IBM]

HGA Hercules Graphics Adapter

HGCP Hercules Graphics Card Plus

HH Hour

HIF Hyper-G Interchange Format

HIFD High-Density Floppy Disk

HIL Human Interface Link [HP]

HIMEM High Memory

HIPPI High Performance Parallel Interface

HLCO High Low Close Open

HLL High Level Language

HLLAPI High Level Language Application Programming Interface

.HLP Help (file name extension)

HLQ High Level Qualifier

HLS Hue, Luminance, Saturation (color model)

HLT Halt

HMA High Memory Area [Microsoft] +

Hub Management Architecture

HMD Head Mounted Display

HMM Hidden Markov Model

HMMP Hyper-Media Management Protocol

HMOS High Density Metal Oxide Semiconductor +

High Speed Metal Oxide Semiconductor

HMP Host Monitoring Protocol

HOTT Hot Off The Tree (electronic newsletter)

HOV High Occupancy Vehicle

HP Hewlett-Packard (Company)

HPC Handheld Personal Computer

HPCC High Performance Computing and Communications

HPDJ Hewlett-Packard Desk Jet

HPFS High-Performance File System

HPG Hewlett-Packard Graphics

HPGL Hewlett-Packard Graphics Language

HPIB Hewlett-Packard Interface Bus

HPLJ Hewlett-Packard Laser Jet

HPOM Home Page Objects Model [Microsoft]

HPPA Hewlett-Packard Precision Architecture

HPPI High Performance Parallel Interface

HPR High Performance Routing [IBM]

HPSB High Performance Serial Bus

HPUX Hewlett-Packard Unix

HPW High Performance Workstation [Sun]

.HQX BinHex (file name extension) [Macintosh]

HRIS Human Resource Information System

HRG High Resolution Graphics

HRMS Human Resource Management System

HRTF Head Related Transfer Function

HS High Speed

HSB Hue, Saturation, Brightness (color model)

HSC Hierarchical Storage Controller + High Speed Channel

HSI Hue, Saturation, Intensity

HSM Hierarchical Storage Management

HSP High Speed Printer/Processor

HSSI High Speed Serial Interface

HST High Speed Technology [U.S. Robotics]

.HST History + Host (file name extensions)

HSV Hue Saturation value

HTML HyperText Markup Language

HTTP HyperText Transfer Protocol

HTTP-NG HTTP Next Generation

HTTPS HyperText Transfer Protocol Secure

HUD Heads Up Display

HUT Hopkins Ultraviolet Telescope

H/V Horizontal/Vertical

HVP Horizontal & Vertical Position

H/W Hardware

HWCP Hardware Code Page

HWD Height-Width-Depth

.HYP Hyphenation (file name extension)

HYTELNET Hypertext-browser for Telnet Accessible Sites

Hz Hertz

I...

IAB Internet Architecture Board

IAC Inter-Application Communication [Macintosh]

IAG Instruction Address Generation

IAK Internet Access Kit [IBM]

IAL * International Algebraic Language

(ALGOL was first called IAL)

IANA Internet Assigned Numbers Authority

IAP Internet Access Provider

IAS Internet Access Server

IAT Import Address Table

IAUP Internet User Account Provider

IBC Instrument Bus Computer

iBCS Intel Binary Compatibility Specification

IBIP Information Based Indicia Program [U.S. Postal Service]

IBM International Business Machines (Corporation)

IBM-GL IBM Graphics Language

IC Input Circuit + Integrated Circuit + Interrupt Controller

ICA Intelligent Console Architecture +

Intra-application Communications Area

ICAP Internet Calendar Access Protocol [Lotus]

ICAS Intel Communicating Applications Specifications

ICB Internet Citizen's Band

ICCP Institute for the Certification of

Computing Professionals

ICD International Code Designator

ICE In-Circuit Emulator [Intel] +

Integrated Computing Environment [Langley Research]

ICES Interference-Causing Equipment Standard

ICI Image Component Information

ICL Interface Clear

ICLID Incoming-Call Line Identification

ICM Image Color Matching [Kodak] + Incoming Message

ICMP Internet Control Message Protocol [Novell]

.ICO Icon (file name extension)

iCOMP Intel Comparative Microprocessor Performance [Intel]

ICP Image Coprocessor + Integrated Channel Processor

ICQ I Seek You (messaging program0

ICR Intelligent Character Recognition

ICS Intuitive Command Structure

ICSAPI Internet Connection Services API

ICU Instruction-Cache Unit +

Intel Configuration Utility [Microsoft] +

ISA Configuration Utility

ID Identification + Identifier

IDA Integrated Digital Access + Intelligent Disk Array +

Intelligent Drive Array

IDAPI Integrated Database Application Programming Interface

IDC Integrated Database Connector +

Integrated Desk Connector +

Internet Database Connector [Microsoft]

IDDE Integrated Development & Debugging Environment [Symantec]

IDE Imbedded Drive Electronics +

Integrated Development Environment [Borland] +

Integrated Drive Electronics +

Intelligent Drive Electronics +

Interactive Design and Engineering +

Interface Design Enhancement

IDEA International Data Encryption Algorithm

IDF Intermediate Distribution Frame

IDI Initial Domain Identifier

IDIV Integer Divide

IDL Interactive Data Language +

Interface Definition Language

IDM Integrated document Management

IDMS Integrated Data Base Management System

IDNX Integrated Digital Network Exchange [IBM]

IDP Integrated Data Processing

IDR Intelligent document Recognition

IDT Interface Design Tool + Interrupt Descriptor Table

.IDX Index (file name extension)

IE Internet Explorer [Microsoft]

IEC International Electrotechnical Commission

IEEE Institute of Electrical and Electronics Engineers

IEF Information Engineering Facility

IEMSI Interactive Electronic Mail Standard

Identification

IEN Internet Engineering Notes

IETF Internet Engineering Task Force

IESG Internet Engineering Steering Group

I/F Interface

IFC Internet Foundation Classes

IFD Image File Directory

IFF Interchangeable File Format [Amiga]

IFG Incoming Fax Gateway

IFP Instruction Fetch Pipeline

IFS Installable File System

IFSM Information Systems Management

IGA Integrated Graphics Array

IGC Integrated Graphics Controller

IGES Initial Graphics Exchange Standard

IGFET Insulated-Gate Field Effect Transistor

IGMP Internet Group Multicast Protocol

IGP Interior Gateway Protocol

IGRP Interior Gateway Routing Protocol [Cisco]

IGS Internet Go Server

IHD Integrated Help Desk [IBM]

IHV Independent Hardware Vendor

IIF Immediate Interface

III Interstate Identification Index [NCIC]

IIOP Internet Inter-ORB Protocol

IIR Immediate Impulse Response

IIS Internet Information Server [Microsoft]

IITF Information Infrastructure Task Force

IKP Internet Keyed Payments [IBM]

ILA Image Light Amplifier

ILE Integrated Language Environment [IBM]

ILP Instruction-Level Parallelism

ILS International Language Support

iMAC Internet Macintosh [Apple]

IMACS Image Management and Communication System

IMAP Internet Message Access Protocol

IMAX Maximum Image

IMDS Image Data Stream (format) [IBM]

IME Input Method Editor

IMG Image

IML Initial Microcode Load [IBM]

IMP Information/Interface Message Processor

IMPA Intelligent Multi-Port Adapter [DCA]

IMR Internet Monthly Report

IMS Information Management System +

Intermediate Maintenance Standards

IMSP Internet Message Support Protocol

IMTC International Multimedia Teleconferencing Consortium

IMTV Interactive Multimedia Television

IMUL Integer Multiply

IMUX Inverse Multiplexer

IN Input

INC Increment

.IND Index (file name extension)

.INF Information (file name extension)

.INFO Information Services (Domain Name) [Internet]

INFS Internet Network File System

.INI Initialize (file name extension)

INIT Initialization + Initialize

INM Integrated Network Management

INND Internet News Daemon

INS Input String + Integrated Network Server

INT Integer + Internal + Interrupt +

International (organization Domain name) [Internet]

INTA Interrupt Acknowledge

InterNIC Internet Network Information Center

INTO Interrupt if Overflow occurs

I2O Intelligent Input/Output

I/O Input/Output

IOC Inter-Office Channel

IOCC Input/Output Channel Converter +

Input/Output Controller Chip

IOCS Input/Output Control System

IOCTL Input/Output Control

IODE Integrated Development and Debugging

Environment [Symantec]

IOP Input/Output Processor

IOPL Input/Output Privilege Level

IOR Interoperable Object Reference

IOSGA Input/Output Support Gate Array

IP Instruction Pointer + Intellectual Property +

Internet Protocol

IPBF Installed Peripheral Base Flexibility

IPC Instructions Per Clock + Interprocess Communication

IPCP Internet Protocol Control Protocol

IPCS Integrated PC Server

IPDS IBM Personal Dictation System [IBM] +

Intelligent Printer Data Stream [IBM]

IPFC Information Presentation Facility Compiler [IBM]

IPI Intelligent Peripheral Interface

IPL Initial Program Load/Loader +

Ion Projection Lithography

IPL * Information Programming Language

IPM Images Per Minute + Interpersonal Message

IPMI Intelligent Platform Management Interface

IPng Internet Protocol, next generation

IPP Internet Printing Protocol

IPSE Integrated Project Support Environment

IPTC International Press Telecommunications Council

IPX Internetwork Packet Exchange [Novell]

IQL Interactive Query Language

IR Infrared

IRC Internet Relay Chat

IRD Integrated Receiver/Descrambler

IRDA Infrared Data Association

IRDS Information Resource Dictionary System

IRET Interrupt Return

IRF Intermediate Routing Function +

Inheritance Rights Filter [Novell]

IRL Interactive Reader Language + Inter-Repeater Link

IRLAP Infrared Link Access Protocol

IRLED Infrared Light Emitting Diode

IRM Information Resource Management + Inherent Rights Mask

IRQ Interrupt Request

IRTF Internet Research Task Force

IRX Information Retrieval Experiment

IS Information System + Interrupt Status

ISA Industry Standard Architecture +

Instruction-Set Architecture

ISAM Indexed Sequential-Access Management/Method

ISAPI Internet Server API [Microsoft]

ISBN International Standard Book Number

ISC Instruction Set Computer + Inter-Systems

Communication [IBM]

ISD Image Section Descriptor +

Instructional Systems Design

ISDN Integrated Services Digital Network

ISH Information Super Highway

ISI Internally Specified Index

ISIS Integrated Systems and Information Services

ISKM Internet Starter Kit for the Macintosh

ISL Interactive System Language

ISM Integrated Services Model [IETF] +

Internet Service Manager [Microsoft]

ISMF Interactive Storage Management Facility

ISOC Internet Society

ISO International Organization for Standardization

ISP Internet Service Provider + Interrupt Stack Pointer +

Interrupt Status Port

ISPF Interactive System Programming Facility

ISR Information Storage and Retrieval +

Interrupt Service Routine +

Interrupt Status Register

ISSN International Standard Serial Number

ISV Independent Software Vendor

IT Information Technology

ITB Information Technology Branch + Intermediate Text Block

ITC International Typeface Corporation

ITE Information Technology Equipment

ITF Interactive Test Facility

ITN Identification Tasking and Networking

ITR Internet Talk Radio

ITU International Telecommunication Union

ITUG International Telecommunications User Group

ITU-TIES ITU-Telecom Information Exchange Services

ITU-TSS ITU-Telecommunication Standards Section

ITV Interactive Television

ITX Intermediate Text Block

IU Integer Unit

IUAP Internet User Account Provider

IUS/ITB Interchange Unit Separator/Intermediate Transmission

Block

IVDS Integrated Voice and Data Systems

IVIS Interactive Video Information System

IVL Independent Vendor League + Intel Verification Lab

IVR Interactive Voice Response

IVS Interactive Videodisk System

IVT Interrupt Vector Table

IV&V Independent Verification & Validation

I-WAY Information Highway

IXC Interexchange Carrier

J...

JA Jump Address + Jump if Above

JAD Joint Application Design

JAE Jump if Above or Equal

JANET Joint Academic Network

JAR Java Archive (file format)

JBE Jump if Below or Equal

JC Jump if Carry set

JCL Job Control Language

JDBC Java Database Connectivity

JDK Java Development Kit

JE Jump if Equal

JEDEC Joint Electronic Devices Engineering Council

JEIDA Japanese Electronics Industry Development Association

JEPI Joint Electronic Payment Initiative

JES Job Entry System

JFC Java Foundation Classes

JFET Junction Field Effect Transistor

JFIF JPEG File Interchange Format

JFS Journaled File System [IBM]

JG Jump if Greater

JGE Jump if Greater or Equal

JIPS JANET Internet Protocol Service

JIT Just-In-Time (compiler)

JL Jump if Less

JLE Jump if Less than or Equal to

JLIP Joint Level Interface Protocol

JMAPI Java Management Application Program Interface

JMF Java Media Framework [Sun]

JMP Jump

JMS Java Message Service

JNA Jump if Not Above

JNAE Jump if Not Above or Equal

JNB Jump if Not Below

JNBE Jump if Not Below or Equal

JNG Jump if Not Greater

JNGE Jump if Not Greater or Equal

JNI Java Native Interface

.JNK Junk (file name extension)

JNLE Jump if Not Less or Equal

JNO Jump if No Overflow

JNP Jump if No Parity

JNS Jump if No Sign

JOE Java Objects Everywhere

JOHNNIAC* John Neumann Integrator and

Automatic Computer [Rand Corp.]

JOSS * Johnniac Open Shop System [Rand Corp.]

JPE Jump if Parity Even

JPEG Joint Photographic Experts Group

JPL Jet Propulsion Laboratory

JPO Jump if Parity Odd

JRE Java Runtime Environment

JS Jump if Sign

JTAPI Java Telephony Application Programming Interface

JZ Jump if Zero

JNZ Jump if Not Zero

JSS Java-script Style Sheet

JUGHEAD Jonzy's Universal Gopher Hierarchy

Excavation and Display [Internet]

JVM Java Virtual Machine

K...

K-12 Kindergarten through 12th Grade [US Education System]

KAM Keep Alive Memory

Kb Kilobit

KB Keyboard + Kilobyte (1,024 bytes)

KBD Keyboard (also KEYB)

KBD$ Keyboard [OS/2]

KBE Knowledge Based Engineering

Kbps Kilobits Per Second

KBps Kilobytes Per Second

KDT Key Definition Table

KEFIR Key Findings Reporter [GTE]

KEYBBE Foreign language KEYBoard program - Belgium

KEYBBR Foreign language KEYBoard program - Brazil

KEYBCF Foreign language KEYBoard program - Canadian-French

KEYBCZ Foreign language KEYBoard program - Czechoslovakia

(Czech)

KEYBDK Foreign language KEYBoard program - Denmark

KEYBFR Foreign language KEYBoard program - France

KEYBGR Foreign language KEYBoard program - Germany

KEYBHU Foreign language KEYBoard program - Hungary

KEYBIT Foreign language KEYBoard program - Italy

KEYBLA Foreign language KEYBoard program - Latin America

KEYBNL Foreign language KEYBoard program - Netherlands

KEYBNO Foreign language KEYBoard program - Norway

KEYBPL Foreign language KEYBoard program - Poland

KEYBPO Foreign language KEYBoard program - Portugal

KEYBSF Foreign language KEYBoard program - Swiss-French

KEYBSG Foreign language KEYBoard program - Swiss-German

KEYBSL Foreign language KEYBoard program - Czechoslovakia

(Slovak)

KEYBSP Foreign language KEYBoard program - Spain

KEYBSU Foreign language KEYBoard program - Finland

KEYBSV Foreign language KEYBoard program - Sweden

KEYBUK Foreign language KEYBoard program - United Kingdom

KEYBUS Foreign language KEYBoard program - United States

KEYBYU Foreign language KEYBoard program - Yugoslavia

KHz Kilohertz

KIF Knowledge Interchange Format

KIS Knowbot Information Service [Internet]

KPI Kernel Programming Interface

KQML Knowledge Query and Manipulation Language

KSH Korn Shell (program) [Unix]

KSPH Keystrokes Per Hour

KSR Keyboard Send Receive

KRS Knowledge Retrieval System

L2F Layer Two Forwarding [Cisco]

L2TP Layer Two Tunneling Protocol

LADDR Layered Device Driver Architecture [Microsoft]

LALL Longest Allowed Lobe Length

LAN Local Area Network

LANACS Local Area Network Asynchronous Connection Server

LANDP LAN Distributed Platform

LANE Local Area Network Emulation

LANG Language

LAPB Link Access Procedure Balanced (protocol)

LAPD Link Access Procedure on the D-Channel (protocol)

LAPM Link Access Procedure for Modems

LAR Load Access Rights

LASER Light Amplification by Stimulated Emission of Radiation

LASTport Local Area Storage Transport (protocol) [DEC]

LAT Local Access Terminal +

Local Area Transport [DEC]

LATA Local Access and Transport Area

LAVC Local Area VAX Cluster

LAWN Local Area Wireless Network

LB Left Button (of 2 or 3 button Mouse)

LBA Logical Block Addressing

LBL Label

LBR Librarian

.LBR Library (file name extension)

LBT Listen Before Talk

LBX Local Bus Accelerator

LCA Lotus Communications Architecture [Lotus]

LCC Leadless Chip Carrier

LCD Liquid Crystal Display + Lowest Common Denominator

LCF Low Cost Fiber

LCK Library Construction Kit [Microsoft FoxPro]

LCP Link Control Protocol

LCR Least Cost Routing + Line Control Register

LCSD Laminate Chip Signal Diode

LCU Last Cluster Used

LDA Logical Device Address

LDAP Lightweight Directory Access Protocol [IBM]

LDC Lotus Development Corporation

LDDS Long Distance Discount Services (company)

LDM Long Distance Modem

LDT Local Descriptor Table

LE Less or Equal

LEA Load Effective Address

LEAF Law Enforcement Access Field

LEC Local Area Network Emulation Client +

Local Exchange Carrier

LED Light Emitting Diode

LEL Link, Embed and Launch-to-edit [Lotus]

LEM Language Extension Module

LEN Low Entry Networking

LEO Low Earth Orbit

LES Local Area Network Emulation Server

.LET Letter (file name extension)

LEX Lexicon

LF Line Feed

LFAP Lightweight Flow Admission Protocol

LFI Last File Indicator

LFN Long File Name

LFT Low Function Terminal [IBM]

LFU Least Frequently Used

LGA Leadless Grid Array

LGDT Load Global Descriptor Table

LIAS Library Information Access System

.LIB Library (file name extension)

LIC Line Interface Coupler [IBM]

LICS Lotus International Character Set [LDC]

LIDT Load Interrupt Descriptor Table

LIEP Large Internet Exchange Packet [Novell]

LIF Low Insertion Force

LIFO Last In, First Out

LILO Last In, Last Out

LIM Lotus/Intel/Microsoft

LIMA Lotus/Intel/Microsoft/AST

LIMDO Light Intensity Modulation Direct Overwrite

LIMM Light Intensity Modulation Method

LIMS Library Information Management System

LINUX (Operating system named after Linus Torvalds)

LIP Large Internet Packet

LIPS Lightweight Internet Person Schema +

Logical Inferences Per Second

LISP List Processing (Language)(See HLL)

LISTSERV List Server [Internet]

LIU LAN Interface Unit

LIW Long Instruction Word

LLC Logical Link Control

LLDT Load Local Descriptor Table

LLF Low Level Format

LMB Left Mouse Button

LMBCS Lotus Multi-Byte Character Set [Lotus]

LMD Last Modification Date

LMDS Local Multipoint Distribution Service

LMI Link/Local Management Interface

LMS Lotus Messaging Switch [Lotus]

LMSW Load Machine Status Word

LMU LAN Management Utilities [IBM] +

LAN Manager for Unix

LN Load Number + Logarithm (Natural)

LN:DI Lotus Notes:document Imaging

LNK Link

LOB Line of Business

LOC Lines Of Code + Loop On-Line Control

LOCIS Library of Congress Information System

LOD Level Of Detail

LODSB Load String Byte

LOG Logarithm (Base 10)

LOGO (Programming Language)(See HLL)

LON Local Operating Network

LOOPE Loop while Equal

LOOPNE Loop while Not Equal

LOOPNZ Loop while Not Zero

LOOPZ Loop while Zero

LORE Line Oriented Editor

LPAR Logic Programming and Automated Reasoning

LPC Local Procedure Call

LPD Line Printer Daemon (protocol) [Berkley]

LPI Lines Per Inch

LPL Lotus Programming Language [Lotus 1-2-3] [LDC]

LPM Lines Per Minute

LPN Logical Page Number

LPR Line Printer Remote

LPS Low-Power Schottky

LPT Line Printer

LPT1 First Parallel Printer Port

LPT2 Second Parallel Printer Port

LPT3 Third Parallel Printer Port

LQ Letter Quality

LQM Link Quality Monitoring (protocol)

LR Link Register

LRC Local Register Cache +

Longitudinal Redundancy Check

LRL Least Recently Loaded

LRM Language Reference Manual + Least Recently-Used Master

.LRS Language Resource (file name extension) [WordPerfect]

LRU Least Recently Used

LSA LAN and SCSI Adapter [IBM] + Line Sharing Adapter +

Local Security Authority [Microsoft]

LSAPI License Services Application Program Interface

LSB Least Significant Bit

LSC Least Significant Character

LSD Least Significant Digit

LSI Large Scale Integration

LSL Link Support Layer + Load Segment Limit

LST List

.LST List (file name extension)

LTO Linear Tape Open

LTR Left-To-Right + Letter + Load Task Register

LU Logical Unit (Also LUN)

LUA Logical Unit Application (interface)

LUI Local User Input

LUIS Library User Information Service

LUN Logical Unit Number

LUT Lookup Table

LV Logical Volume [IBM]

LVDS Low-Voltage Differential Signaling

LVM Logical Volume Management [IBM]

LW Lazy Write

.LYR Lyrics (music file name extension)

LZW Lempel-Ziv-Welch (algorithm)

M...

mA Milliampere

MAC Macintosh (Apple Macintosh Computer) +

Media/Medium Access Control +

Message Authentication Code

MAC * Multiple Access Computers

.MAC MacPaint (file name extension) +

Macro (file name extension)

MACH Multilayer Actuator Head [Epson]

MADE Manufacturing and Automated Design Engineering

MADYMO Mathematical Dynamic Modeling [TNO]

MAE Merit Access Exchange + Metropolitan Area Ethernet

MAGMA Minimal Architecture for Generalized Markup Appli, cations

mAh Milliampere-Hour

MAI Multiple Applications Interface

.MAI Mail (file name extension)

MAJC Microprocessor Architecture for Java Computing [Sun]

MAN Manual [Unix] + Metropolitan Area Network

MANIAC * Mathematical Analyzer Numerical

Integrator and Computer

MANPAGE Manual Page [Unix]

MAP Maintenance Analysis Procedures +

Manufacturing Automation Protocol +

Memory Allocation Map

.MAP Linker Map (file name extension)

MAPI Mail/Messaging Applications Programming

Interface [Microsoft]

MAPICS Manufacturing, Accounting and Production

Information Control System [IBM]

MARC Machine Readable Cataloging +

Multi-Technology Automated Reader Card

MARVEL Machine-Assisted Realization of the Virtual

Electronic Library [Library of Congress]

MASM Macro Assembler [Microsoft]

MASS Maximum Availability and Support

Subsystem [Parallan]

MAT Maintenance Access Terminal

MAU Media Access/Adapter Unit + Multistation Access Unit

MAVDM Multiple Application VDM

MAX Maximum

MB Megabyte (1,024 kilobytes) +

Middle Button (of 3 button Mouse)

MBASIC Microsoft BASIC [Microsoft]

MBCS Multi-Byte Character Set [IBM]

MBONE Multicast Backbone [Internet]

MBps Megabytes Per Second

Mbps Megabits Per Second

MBR Master Boot Record

MBX Mailbox

MCA Micro Channel Adapter/Architecture [IBM]

MCAD Mechanical Computer Aided Design

MCB Memory Control Block

MCF Meta Content Framework

MCGA Multicolor Graphics Array

MCI MCI Communications Corp. (name from initials of

original company - Microwave Communications, Inc.) +

Media Control Interface [Microsoft]

MCL Microsoft Compatibility Labs [Microsoft]

MCM Multi-Chip Module

MCNE Master Certified Novell Engineer [Novell]

MC-PGA Metallized Ceramic - Pin Grid Array

MCPS Microsoft Certified Product Specialist [Microsoft]

MC-QFP Metallized Ceramic - Quad Flat Pack

MCR Modem Control Register

MCSD Microsoft Certified Systems Developer [Microsoft]

MCSE Microsoft Certified Systems Engineer [Microsoft]

MCU Microcontroller Unit + Multi-Chip Unit [DEC] +

Multipoint Control Unit

MD Make Directory + Mini Disk [Sony] + Monochrome Display

MDA Monochrome Display Adapter +

Multidimensional Analysis

MDDBMS Multidimensional Data Base Management System

.MDF Menu Definition File (file name extension)

MDI Memory Display Interface +

Multiple document Interface

MDIC Manchester Decoder and Interface Chip [AT&T]

MDK Multimedia Developers Kit [Microsoft]

MDLP Mobile Data Link Protocol

MDR Minimum Design Requirement

MDY Month Day Year

.ME Opening Information (file name extension) (As in READ.ME)

MEB Memory Expansion Board

MEG Megabyte

MEM Memory

.MEN Menu (file name extension)

MERCI Multimedia European Research Conferencing Integration

MES Manufacturing Execution System

MESI Modified, Exclusive, Shared and Invalid (protocol)

MET Memory Enhancement Technology [Hewlett-Packard]

.MET Metafile (file name extension)

MFC Microsoft Foundation Class [Microsoft]

MFFS Microsoft Flash File System [Microsoft]

MFI Multifunction Interpreter

MFIOP Multifunction I/O Processor

MFLOPS Million Floating Point Operations Per Second

MFM Modified Frequency Modulation

MFP Multi-Function Peripheral/Product

MFPI Multifunction Peripheral Interface

MFS Macintosh File System [Macintosh] +

Magnetic Tape Field Search + Memory File System

Modified Filing System [Revelation Technologies]

MFT Master File Table +

Multiprogramming with a Fixed number of Tasks

MGA Monochrome Graphics Adapter

MGCP Media Gateway Control Protocol

MGE Modular GIS Environment

MGET Multiple Get [Unix]

MGML Minimal Generalized Markup Language

MGR Manager

MHS Message Handling Service + Message Handling System

MHz Megahertz

MI Management Interface

MIB Management Information Base

MIC Message Integrity Check

MICR Magnetic Ink Character Recognition

MICRO One-millionth

MICS Macro Interpretive Commands

MIDI Musical Instrument Digital Interface

MIF Management Information Format

.MIF Management Information Files (file name extension)

MIG Metal In Gap

MII Microsoft/IBM/Intel

MIL Machine Interface Layer [Go Corporation] +

.MIL Military (Domain name) [Internet]

MIM Map Image Metafile + Metal-Insulator-Metal (screen)

MIMD Multiple Instruction Multiple Data Stream (processor)

MIME Multipurpose Internet Mail Extension [Internet]

MI/MIC Mode Indicate/Mode Indicate Common

MIN Minimum + Mobile Identification Number

MIND Microsoft Internet Developer [Microsoft]

MINUET Minnesota Internet Users Essential Tools [Internet]

MIPS Million Instructions Per Second

MIS Management Information System +

Multimedia Information Sources [Internet]

MISC Miscellaneous

MIX Member Information Exchange

MKDIR Make Directory

ML Machine Language + Meta Language

MLAPI Multilingual Application Programming Interface

MLC Multilayer Ceramic +

Multilevel Cell (program) [Internet]

MLE Multi-Line Editor

MLID Multi-Link Interface Driver

MLM Mailing List Manager [Internet]

MLPPP Multilink PPP

MM Minutes + Month

MMA Microcomputer Managers Association

MMC Matched Memory Cycle + Microcomputer Marketing Council +

Microsoft Management Console [Microsoft]

MMCD MultiMedia Compact Disk

MMCX Multimedia Communication Exchange [Lucent Technologies]

MMI Man-Machine Interface

MMIS Materials Manager Information System

MMPM Multi Media Presentation Manager

MMU Memory Management Unit

MMVF Multimedia Video File [NEC]

MMX Matrix Manipulation Extensions [Intel] +

Multimedia Extensions

MNOS Metal Nitride Oxide Semiconductor

MNP Microcom Networking Protocol [Microcom]

.MNU Menu (fine name extension)

MO Magneto-Optical (disk drive)

MOB Memory-Order Buffer

MOBO Mother Board

MOD Module + Modulus

MODEM Modulator Demodulator

MOHLL Machine Oriented High Level Language

MOLAP Multidimensional On-Line Analytical Processing

MOM Manufacturing Operations Management +

Message-Oriented Middleware +

Microsoft Office Manager [Microsoft]

MONET Multiwavelength Optical Networking

MONO Monaural

MOO MUD, Object Oriented [Internet]

MOP Maintenance Operations Protocol

MOPS Million Operations Per Second

MOS Magneto-Optic Storage + Mean Opinion Score +

Metal Oxide Semiconductor

MOSFET Metal Oxide Semiconductor Field Effect Transistor

MOTD Message Of The Day

MOV Metal Oxide Varistor + Move

MOVS Move String

MP Massively Parallel (processing) + Multiple Processors

MP3 MPEG Audio Layer 3

MPC Multimedia Personal Computer + Multipath Channel

MPCS Mission Planning and Control Station (Software)

MPE Multiple Programming Executive [HP]

MPEG Moving Picture Experts Group

MPI Message Passing Interface + Multiprecision Integer

MPM Message Passing Library [IBM]

MPMD Multiple Processor/Multiple Data

MPOA Multi-Protocol over Asynchronous-Transfer-Mode

MPP Massively Parallel Processing +

Message Posting Protocol + Message Processing Program

MPQP Multi-Protocol Quad Port [IBM]

MPR Multipart Repeater + Multi Protocol Router [Novell]

MPS Multiprocessor Specification

MPTN Multi-Protocol Transport Network

MPTS Multi-Protocol Transport Services

MPU Microprocessor Unit

MQI Messaging and Queuing Interface [IBM]

MR Magneto Resistive + Modem Ready

MRCF Microsoft Realtime Compression Format

MRCI Microsoft Realtime Compression Interface

MRI Magnetic Resonance Imaging

MRM Most Recently-Used Master

MRO Multi-Region Operation

MRP Materials Requirement Planning

MRPL Main Ring Path Length

MRS Media Recognition System

MRT Mean Repair Time

MRU Maximum Receive Unit

MS Memory System + Message Store + Microsecond +

Microsoft Corporation + Millisecond

MSACM Microsoft Audio Compression Manager [Microsoft]

MSAU Multi-Station Access Unit

MSAV Microsoft Anti Virus [Microsoft]

MSB Most Significant Bit

MSBF Mean Swaps Between Failures

MSCDEX Microsoft Compact Disc Extensions [Microsoft]

MSCHAP Microsoft Challenge Handshake Authentication

Protocol [Microsoft]

MSD Mass Storage Device + Most Significant Digit +

Microsoft System Diagnostics [Microsoft]

MSDE Microsoft Data Engine

MSDN Microsoft Developer Network [Microsoft]

MS-DOS Microsoft - Disk Operating System [Microsoft]

MSDR Multiplexed Streaming Data Request

MSDS Microsoft Developer Support [Microsoft]

MSFR Minimum Security Function Requirements [IBM]

MSG Message

.MSG Program Message (file name extension)

MSI Medium Scale Integration

MSIE Microsoft Internet Explorer [Microsoft]

MSL Map Specification Library + Mirrored Server Link

MSMQ Microsoft Message Queue-Server [Microsoft]

MSN Microsoft Network [Microsoft]

MSO Multiple-Systems Operator

.MSP Microsoft Paint (file name extension) [Microsoft]

MSRP Manufacturer Suggested Retail Price

MSS Mass Storage System +

Multiprotocol Switched Services [IBM]

MSTS Microsoft Terminal Server [Microsoft]

MSW Machine Status Word

MTA Message Transfer Agent + Multiple Terminal Access

MTBB Mean Time Between Breakdowns

MTBF Mean Time Between Failures

MTBJ Mean Time Between Jams

MTF Microsoft Tape Format [Microsoft] +

Modulation Transfer Function

MTRP Maximum Transfer Rate Performance

MTS Message Transfer Service/System +

Microsoft Transaction Server [Microsoft] +

Multichannel Television Sound

MTST Magnetic Tape Selectric Typewriter [IBM]

MTT Multi-Transaction Timer

MTTD Mean Time To Diagnose

MTTF Mean Time To Failure

MTTR Mean Time To Repair

MTU Maximum Transmission Unit

MUA Mail User Agent

MUD Multi-User Dialogue/Dimension/Domain/Dungeon [Internet]

MUL Multiply

MULTICS Multiplexed Information and Computing Service

MUMPS Massachusetts General Hospital Utility

Multi-Programming System (Programming Language)

MUSE Multi-User Shared Environment

MUT Monitor Under Test

MUX Multiplexer

mV Millivolt

MVB Multimedia Viewer Book

MVC Multimedia Viewer Compiler

MVDM Multiple Virtual DOS Machines

MVGA Monochrome Video Graphics Array

MVIP Multi-Vendor Integration Protocol

MVP Multimedia Video Processor

MVS Multiple Virtual Storage

MVT Multiprogramming with a Variable number of Tasks

MX Mail Exchanger [Internet]

MXS Microsoft Exchange Server [Microsoft]

MZR Multiple Zone Recording

N...

NAC Network Adapter Card

NACD National Association of Computer Dealers

NACS National Advisory Committee on Semiconductors

NAE Not Above or Equal

NAK Negative Acknowledgment

NAM Number Assignment Module

NAMPS Narrow-Band Analog Mobile Phone Service [Motorola]

NAND Not And

NANO One thousand-millionth

NAP Network Access Point

NAPLPS North American Presentation Level Protocol

Syntax (graphics)

NAS Network Access Server + Network Application Support [DEC] +

Network Attached Storage

 

NASA National Aeronautics and Space Administration

NASDAQ National Association of Securities Dealers

Automatic Quotation

NASI NetWare Asynchronous Services Interface [Novell]

NASIRC NASA Automated Systems Internet Response Capability

NASKER NASA Ames Kernel (benchmark)

NAT Network Address Translators

NAU Network Addressable Unit

NAWS Negotiate About Window Size

NBE Not Below or Equal

NBI Nothing But Initials

NBMA Non-Broadcast Multi Access

NBS Narrowband Socket + National Bureau of Standards +

Numeric Backspace

NC Network Computer + No Carry + Numerical Control

NCA Network Communications Adapter +

Network Computing Architecture [Oracle]

NCC Network Control Center

NCD Network Computing Device

.NCF Netware Command File [Novell]

NCGA National Computer Graphics Association

NCIC National Crime Information Center

NCMT * Numerical Control for Machine Tools

NCOS Network Computer Operating System

NCP NetWare Core Protocol + Not Copy Protected +

Network Control Processor/Program/Protocol

NCR National Cash Register (Company)

NCSA National Center for Supercomputing Applications

NCSC National Computer Security Center

NCSI Network Communications Services

Interface [Network Products Corp.]

NDB Non-Directional Beacon

NDDK Network Device Development Kid [Microsoft]

NDEF Not to be Defined

NDIS Network Device/Driver Interface Specification

NDL Network Data Language

NDMP Network Data Management Protocol

NDN Non-Delivery Notice

NDP Numeric Data Processor

NDR Network Data Representation

NDRO Non-Destructive Read Out

NDS NetWare Directory Service [Novell]

.NDX Index (file name extension)

NEC Nippon Electric Company

NED NASA Extragalactic Database [NASA]

NEG Negative + Negate

NEMA National Electrical Manufacturers Association

NEP Network Entry Point

NES National Education Supercomputer

NEST Novell Embedded Systems Technology [Novell]

.NET Networks (Domain Name) [Internet]

NetBIOS Network Basic Input/Output System [IBM]

NetBEUI NetBIOS Extended User Interface [IBM]

NETMON Network Monitor

.NEW New Information (file name extension)

NEWS NetWare Early Warning System [Frye Computer] +

Network Extensible Window System

NEWS. Current events [USENET Newsgroup Category]

NEXT Near-End Crosstalk

NFF No Fault Found

NFS Network File System [Sun]

NG No Good

NGE Not Greater or Equal

NGI Next-Generation Internet

NHC National Hurricane Center

NHR National Handwriting Recognition

NHRP Next Hop Resolution Protocol

N/I Non-Interlaced

NIA Next Instruction Address

NIC Network Information Center [Internet] +

Network Interface Card +

Numeric Intensive Computing

NICAD Nickel-Cadmium

NICOLAS Network Information Center OnLine Aid System [NASA]

NID New Interactive Display [NEC] + Next ID

NII National Information Infrastructure

NIM Network Installation Management [IBM]

NIMH Nickel-Metal Hydride

NIO Native Input/Output

NIPS Network I/Os Per Second

NIR Network Information Retrieval

NIS Network Information Service [Unix]

N-ISDN Narrowband ISDN + National ISDN

NISO National Information Standards Organization

NISP Networked Information Services Project

NIST National Institute for Standards and Technology

NITC National Information Technology Center

NIU Network Interface Unit

NJE Network Job Entry (protocol) [IBM]

NL New Line

NLE Not Less or Equal

NLM NetWare Loadable Module [Netware]

NLP Natural-Language Processing

NLQ Near Letter Quality

NLSFUNC National Language Support Function

NLV National Language Version [IBM]

NMI Non-Maskable Interrupt

NMM NetWare Management Map [NetWare]

NMOS Negative Channel Metal-Oxide Semiconductor

NMP Network Management Protocol [AT&T]

NMS Network Management System [Novell]

NN Network Node + No News [Internet]

NNI Network to Network Interface

NNM Network Node Manager

NNTP Network News Transfer Protocol [Internet]

NOC Network Operations Center

.NOM Individual with Personal Site (Domain Name) [Internet]

NOP No Operation

NOPAC Network OPAC

NOR Not Or

NOS Network Operating System

NPA Network Printer Alliance + Numbering Plan Area

NPI Network Printer Interface

NPL Nonprocedural Language

NPS Novell Productivity Specialist [Novell]

NPT Non-Programmable Terminal

NPTN National Public Telecomputing Network

NPU Natural Processing Unit

NPX Numeric Processor Extension

NQS Network Queuing System [Cray]

NRC National Research Council (Canada)

NREN National Research and Education Network

NRM Network Resource Manager

NRZ Not Return to Zero

NRZI Non Return to Zero Inverted

NS Nanosecond (one-billionth of a second) +

National Semiconductor (as in Ns16550 UART) +

Network Supervisor + Non S

NSAP Network Service Access Point

NSAPI Netscape Server API [Netscape]

NSA POLY National Security Agency Polygraph

NSERC National Sciences and Engineering Research Council

(Canada)

NSF National Science Foundation

NSFNET National Science Foundation Network

NSI NASA Science Internet

NSLOOKUP Name Server Lookup [Unix]

NSM Netscape Server Manager [Netscape]

NSP Native Signal Processing [Intel] + Network Service

Provider

NSSC NASA Standard Spacecraft Computer

NSTC National Science and Technology Council

NSTL National Software Testing Labs

NT New Technology [Microsoft]

NT-1 Network Terminator Type 1

NTAS NT Advanced Server [Microsoft]

NTF No Trouble Found

NTFS New Technology File System [Microsoft]

NTIA National Telecommunications and

Information Administration

NTIS National Technical Information Service

NTP Network Time Protocol

NTRAS NT Remote Access Services [Microsoft]

NTSA NetWare Telephony Services Architecture [Novell]

NTSC National Television Standards Committee

NTU Network Termination Unit

NUI Network User Identification +

Network User Interface +

Notebook User Interface [Go Corporation]

NUL Null + (dummy device) + (no device)

NUMA Non-Uniform Memory Access

NV No Overflow

NVM Non-Volatile Memory

NVOD Near-Video On Demand

NVP Nominal Velocity of Propagation

NVRAM Non-Volatile Random Access Memory

NVT Network Virtual Terminal +

Novell Virtual Terminal [Novell]

NWS NetWare Web Server [Netware]

NYM Anonymous

O...

OAB One-to-All Broadcast

OAD Open Architecture Driver [Bernoulli]

OAG Official Airline Guide + Online Air Guide

OAI Open Applications Interface

OAS One-to-All Scatter

OBD On Board Diagnostics

OBEX Object Exchange [Borland]

OBJ Object

OC Optical Carrier

OCE Open Collaborative Environment [Apple]

OCF Objects Components Framework [Borland]

OCL Operation Control Language + Operator Control Language

OCR Optical Character Recognition

OCS On-Card Sequencer

OCX OLE Custom Control

ODA Open document Architecture

ODAPI Open Database Application Programming

Interface [Borland]

ODBC Object-Oriented Database Connectivity +

Open Data Base Connectivity [Microsoft]

ODBMS Object-Oriented Database Management System (also

see OODMS)

ODI Open Datalink Interface [Novell] +

Open Device Interconnect [NetWare]

ODIF Open document Interchange Format

ODL Object Definition Language

ODM Object Data Manager [IBM] +

Optimized Distribution Model [Compaq]

ODMA Open document Management API

ODP Open Distributed Processing

ODS Open Data Services [Microsoft] +

Operational Data Store

ODSI Open Directory Service Interface [Microsoft]

ODT Open Desk

OEM Original Equipment Manufacturer

OEP Operand Execution Pipeline

OF Overflow Flag

OFB Output Feedback (mode)

OFDM Orthogonal Frequency Division Multiplexing

OFMT Output Format for Numbers

OFS Object File System [Microsoft] + Output Field Separator

OFX Open Financial Exchange

OH Off Hook

OHCI Open Host Controller Interface

OIDL Object Interface Definition Language

OIS Office Information System

OLAP On-Line Analytical Processing

OLCP On-Line Complex Processing

.OLD Old version (file name extension)

OLE Object Linking and Embedding [Microsoft]

OLGA On-Line Guitar Archive

OLI Optical Line Interface [AT&T]

OLMC Output Logic Macrocell

OLSP On-Line Service Provider

OLTP On-Line Transaction Processing

OM Object Manager

OMA Object Management Architecture [Microsoft]

OME Open Messaging Environment (protocol)

OMF Object Module Format [Microsoft] +

Open Media Framework + Open Message Format

OMG Object Management Group

OMI Open Messaging Interface [Lotus]

OML Object Manipulation Language

OMR Optical Mark Recognition

ONC Open Network Computing [Sun]

ONDS Open Network Distribution Services [IBM]

ONE Open Network Environment [Netscape]

ONMS Open Network Management System

ONU Optical Network Unit

OOB Out Of Band

OODB Object-Oriented Database

OODMS Object-Oriented Database Management System (also

see ODBMS)

OOL Object-Oriented Language

OOOS Object-Oriented Operating System

OOPL Object-Oriented Programming Language

OOPS Object Oriented Programming and Systems

OOS Object-Oriented Systems +

Off-line Operating Simulator

OOT Object-Oriented Technology

OOUI Object Oriented User Interface

OP Operation + Optical + Output

OPAC Online Public Access Catalog [Internet]

OPC Organic/Optical Photoconductor

OPCODE Operational Code

OPD Operand

OPI Open Prepress Interface

OPM Operations Per Minute

OPS Open Profiling Standard + Operations

OPT Open Protocol Technology

.OPT Options (file name extension)

OPUS Octal Program Updating System

OQL Object Query Language

ORACLE On-Line Inquiry and Report Generator (UNIX DB program)

ORB Object Request Broker [Microsoft]

ORDVAC * Ordnance Variable Automatic Computer

.ORG Non-Profit Organizations (Domain name) [Internet]

ORI Online Retrieval Interface

.ORI Original (file name extension)

OROM Optical Read-Only Memory

ORS Output Record Separator

OS Operating System

OS/2 Operating System/2 [IBM]

OSA Open scripting/System Architecture

OSD Open Software Description/Distribution

OSE Office Server Extensions [Microsoft]

OS/E Operating System/Environment

OSF Open Software Foundation

OSI Open Systems Interconnection

OSM Off-Screen Model

OSP On-Screen Programming + Optical Storage Processor

OSPF Open Shortest Path First

OSQL Object Structured Query Language

OSR2 OEM Service Release 2 [Microsoft]

OSS Open Source Software

OT Object Technology

OTA Operation-Triggered Architecture

OTDR Optical Time Domain Reflectometer

OTF Open Token Foundation

OTP One-Time Programmable

OUI Organizationally Unique Identifier

OURS Open Users Recommended Solutions

.OUT Outlines (file name extension)

OUTS Output String

OV Overflow

OVAL Object-Based Virtual Application Language [Psion]

.OVL Program Overlay (file name extension)

.OVR Program Overlay (file name extension)

OWL Object/Open Windows Library [Borland]

P...

P3P Platform for Privacy Preferences Project

PAB Personal Address Book

PABX Private Automatic Branch Exchange

PACE Priority Access Control Enabled [3Com]

PACS Picture Archiving and Communication System

PACS-L Public Access Computer Systems List [Internet]

PAD Packet Assembler/Disassembler

PADS Pen Application Development System [Slate Corporation]

PAIH Public-Access Internet Host [Internet]

PAIS Public-Access Internet Site [Internet]

.PAK Packed (compressed file name extension) [NoGate

Consulting]

PAL Paradox Applications Language [Borland] +

Phase Alternating Line + Programmed Array Logic +

Programming Assembly Language

.PAL Palette (file name extension)

PALC Plasma-Addressed Liquid Crystal (display)

PALS Principles of the Alphabet Literacy System

PAM Pulse Amplitude Modulation

PAN Personal Area Network [GTE]

PAP Packet-level Procedure +

Password Authentication Protocol +

Printer Access Protocol

PAR Personal Animation Recorder + Parallel

PARA Paragraph

PARC Palo Alto Research Center [XEROX]

PA-RISC Precision Architecture-RISC [HP]

.PAS PASCAL source code (file name extension)

PASCAL (Programming Language named for Blaise Pascal)

.PAT Patch + Pattern (file name extensions)

PATN Promotional Port Access Telephone Number

PAX Portable Archive Exchange [Unix]

PB Petabyte (1,024 terabytes)

(One Million Billion characters of information)

PBA Printed Board Assembly

PBE Prompt By Example

PBGA Plastic Ball Grid Array

PBX Private Branch Exchange

PC Personal Computer + Printed Circuit + Program Counter

PCACIAS Personal Computer Automated Calibration Interval

Analysis System

PCB Printed Circuit Board + Program Control Block

PCBC Plain/Propagating Cipher Block Chaining

PCD Photo Compact Disk

PC-DOS Personal Computer - Disk Operating System [IBM]

PCEB PCI to EISA Bridge [Intel]

PCI Peripheral Component Interconnect/Interface

PCIC PC-Card Interrupt Controller

PC-I/O Program Controlled I/O

PCL Printer Command Language [HP] + Process Control Language

PCM Personal Computer Manufacturer +

Printer Cartridge Metric [HP] +

Pulse Code Modulation

PCMA Paired Carrier Multiple Access

PCMC PCI, Cache, Memory Controller [Intel]

PCMCIA Personal Computer Memory Card International Association

PCMIM Personal Computer Media Interface Module

PCN Personal Computer Network

PCNFS Personal Computer Network File System

PCO Point of Control and Observation

PCS Patchable Control Store +

Personal Communication Services/System +

Personal Conferencing Specification +

Planning Control Sheet + Print Contrast Signal +

Process Control Systems + Program Counter Store +

Project Control System

PCT Private Communications Technology

.PCT Picture (file name extension)

.PCX Picture Image (file name extension)

PD Phase-Change Dual + Public Domain

PDA Personal Digital Assistant

.PDB Pilot Database (file name extension) [Palm Pilot]

PDC Primary Domain Controller

PDD Physical Device Driver + Portable Digital document

PDF Package Definition File + Portable document Format +

Portable document File + Processor Defined Function +

Program Development Facility

.PDF Printer Description (file name extension)[Borland,Lotus]

PDH Plesiosynchronous Digital Hierarchy

PDIAL Public Dialup Internet Access List [Internet]

PDL Page Description Language + Program Description Language

+ Program Design Language

PDM Product Data Management

PDN Public Data Network

PDO Portable Distributed Objects [Next]

PDP Parallel Data Processing + Plasma Display Panel +

Programmable Data Processor +

(DEC Computer System Designation, i.e. PDP-8, PDP-11)

PDS Packet Driver Specification + Partitioned Data Set +

Planetary Data System + Portable document Software +

Processor Direct Slot [Macintosh]

PDSS Post Development and Software Support

PDT Performance Diagnostic Tool [IBM] +

Programmable Drive Table

PDU Plug Distribution Unit + Protocol Data Unit

.PDX Paradox files (file name extension) [Borland] +

Printer Description Extension (file name extension)

PE Parity Even + Processing Element + Protect Enable

PEA Pocket Ethernet Adapter

PEL Picture Element [IBM]

PEM Privacy-Enhanced Mail [Internet]

PEN SDK Pen Computing Software Development Kit

PEP Packet Exchange Protocol +

Packetized Ensemble Protocol [Telebit]

PERC Power Edge RAID Controller

PERL Practical Extraction and Report Language [Unix]

PERT Program Evaluation and Review Technique

PES Positioning Error Signal + Processor Enhancement Socket

Processor Upgrade Socket

PET Print Enhancement Technology [Compaq]

.PFB Printer Font Binary (file name extension)

PFE Programmer's File Editor

.PFM Printer Font Metrics (file name extension) [Windows]

PFN Page Frame Number

PFR Power-Fail Restart

PGA Pin Grid Array + Professional Graphics Adapter [IBM]

PGC Program Group Control [Microsoft]

PGDN Page Down

.PGL Graphics (file name extension) [Hewlett-Packard]

PGM Program

PGML Precision Graphics Markup Language

PGP Pretty Good Privacy (name of encryption program)

.PGP ProGram Parameter (file name extension) [AutoCAD]

PGUP Page Up

PHIGS Programmers' Hierarchical Interactive Graphics

Standards

.PHO Phone List (file name extension)

PHS Personal Handyphone System

PI Program Interruption

PIA Peripheral Interface Adapter

PIC Personal Information Carrier +

Personal Intelligent Communicator +

Platform for Internet Content +

Priority Interrupt Controller +

Program Interrupt Controller

PICS Platform for Internet Content Selection [W3C]

PICT Picture

PID Process Identification Number + Product ID +

Proportional, Integral, Derivative

PIER Procedures for Internet/Enterprise Renumbering

PIF Picture Interchange Format File +

Program Information File

PII Program Integrated Information

PILOT Programmed Inquiry Learning Or Teaching

PilotACE* Pilot Automatic Computing Engine

PIM Personal Information Manager +

Primary Interface Module +

Protocol-Independent Multicast

PIN Personal Identification Number +

Process Identification Number [Unix]

PINE Pine Is Not Elm (original usage) +

Program for Internet News & Email (present usage)

PING Packet Internet Groper

PIO Parallel Input/Output + Processor Input/Output +

Programmed Input/Output

PIP Pattern and Information Processing +

Picture In Picture + Problem Isolation Procedure +

Programmable Interconnect Point

PIPO Parallel In, Parallel Out

PIR Protocol Independent Routing

PIT Programmable Interval Timer

PIXEL Picture Element

PJPEG Progressive JPEG

PKC Public Key Cryptography

PL Plus

.PL Pearl Language (file name extension)

PLA Programmable Logic-Array

PLATO Programmed Logic for Automatic Teaching Operations

PLC Programmable Logic Controller

PLCC Plastic Leadless Chip Carrier

PLD Programmable Logic Device

PLDS Pilot Land Data System [NASA]

PLL Phase Locked Loop

.PLL Prelinked Library (file name extension) [Clipper]

PL/M Programming Language for Micros

PLS Primary Link Station

PLV Production Level Video

PL/1 * Programming Language One

PM Presentation Manager [IBM] +

Preventative Maintenance + Process Manager

P-MAIL Paper Mail

PMD Packet Mode Data

PMMU Paged Memory Management Unit

PMOS Positive Channel Metal Oxide Semiconductor

PMR Problem Management Report [IBM]

PMS Policy Management System

PN Processing Node

P/N: Part Number

PNA Programmable Network Access

PNG Portable Network Graphics

PNNI Private Network to Network Interface

PNP Plug And Play

PO Parity Odd

POC Point Of Contact

POD Plain Old Dos + Publishing On Demand

POE Power Open Environment

POH Power-On Hours

POL Problem Oriented Language

POP Point Of Presence + Pop from Stack + Post Office Protocol

POP3 Post Office Protocol, Version 3

POPA Pop All Registers

POPF Pop Flags

POR Power-On-Reset

POS Point Of Sale + Positive + Programmable Object Select

POSIX Portable Operating System Interface for Unix

POST Power-On Self Test

POSTNET Postal Numeric Encoding Technique (bar code)

POTS Plain Old Telephone Service + Plain Old Time-Sharing

POWER Performance Optimization with Enhanced RISC [IBM]

PowerPC Performance Optimization with Enhanced RISC-Performance

Computing

PP Parallel Port

PPA Pixel Processing Accelerator

.PPD Postscript Printer Description (file name extension)

PPDS Personal Printer Data Stream [IBM]

PPGA Plastic Pin Grid Array

PPI Precise Pixel Interpolation

PPM Pages Per Minute

PPP Point-to-Point Protocol [Internet]

PPS Packets Per Second + Power Personal Systems [IBM]

PPTP Point-to-Point Tunneling Protocol [Microsoft]

PQFP Plastic Quad Flat Pack

PRACSA Public Remote Access Computer Standards Association

PRAM Parallel Random-Access Machine +

Parameter Random Access Memory

.PRC Pilot Resource (file name extension) [Palm Pilot]

.PRD Printer Driver (file name extension) [Microsoft]

PRE Preformatted [HTML]

PReP Power PC Reference Platform [IBM/Motorola]

PRF Pulse Repetition Frequency

.PRF Preferences (file name extension) [Grammatik IV]

.PRG Program (file name extension)

PRI Primary-Rate Interface

PRINTF Print with Formatting [C Programming Language]

PRISM Photo-Refractive Information Storage Material

.PRJ Project (file name extension) [Borland]

PRMD Private Management Domain [X.400]

PRML Partial-Response Maximum-Likelihood

.PRO Profile (file name extension)

PROC Procedure

PROFS Professional Office System [IBM]

PROG Program + Programmer

PROLOG Programming In Logic (Programming Language)(See HLL)

PROM Programmable Read Only Memory

PRN Printer

.PRS Printer (file name extension) [WordPerfect]

PRTSC Print Screen

PS Proportional Spacing

.PS Postscript (file name extension)

PS/2 Programming System 2 [IBM]

PSAPI Presentation Space Application Programming Interface

PSC Personal Super Computer + Print Server Command +

Product Service Center

PSDN Packet-Switched Data Network

PSDS Packet-Switched Data Service

PSERVER Print Server [NetWare]

PSF Permanent Swap File

PSID Postscript Image Data

PSINET (formerly Performance Systems International)

PSM Printing Systems Manager

PSN Packet Switching Network +

Processor Serial Number

PSP Personal Software Products (group) [IBM] +

Program Segment Prefix

PSPDN Packet-Switched Public Data Network

P-SRAM Pseudo-Static Random Access Memory

PSRT Postscript Round Table [GEnie]

PSTN Public Switched Telephone Network

PSU Power Supply Unit

PSW Program Status Word

.ps.Z Compressed Postscript (file name extension) [Unix]

PT Page Table

P/T Part Time

PTD Parallel Transfer Disk Drive

PTE Page Table Entry

PTF Problem Temporary/Trouble Fix [IBM]

PTI Packet Type Identifier

PTT Postal Telephone & Telegraph

PUB Public (directory) [Internet] + Publish

.PUB Publication (file name extension) [Ventura]

PUN Physical Unit Number

PUP PARC Universal Packet (protocol)

PUS Processor Upgrade Socket

PUSHA Push All Registers

PUSHF Push Flags

PVC Permanent Virtual Circuit + Polyvinyl Chloride

PVM Parallel Virtual Machine +

Pass-through Virtual Machine (protocol) [IBM]

PVP Parallel Vector Processing

PVS Parallel Visualization Server

PW Password

PWB Printed Wire Board +

Programmer's Workbench [Microsoft]

PWD Print Working Directory [Unix]

PWR Power

PWSCS Programmable Workstation Communication Services [IBM]

.PX Primary Index (file name extension) [Paradox]

Q...

QA Quality Assurance

QAM Quadrature Amplitude Modulation

QBE Query By Example

QBF Query by Form

QBIC Query By Image Content [IBM]

QC Quality Control

QD Querty/Dvorak

QDA Qualitative Data Analysis

QDOS Quick and Dirty Operating System

.QDI Quicken Dictionary (file name extension) [Intuit]

.QDT Quicken Data (file name extension) [Intuit]

QEMM Quarterdeck Expanded Memory Manager [Quarterdeck Corp.]

QFA Quick File Access

QFE Quick-Fix Engineering [Microsoft]

QFP Quad Flat Pack

QIC Quality Information Using Cycle Time [Hewlett-Packard] +

Quarter-Inch Cartridge

.QIF Quicken Import File/Interchange Format

(file name extension)

.QMT Quicken Memorized List (file name extension) [Intuit]

.QNX Quicken Indexes to Data (file name extension) [Intuit]

QOS Quality Of Service

QPG Quantum Phase Gate

QPSK Quadrature Phase Shift Keying

QTC Quicktime Conferencing [Macintosh]

R...

RA Return Authorization

.RA Real Audio (file name extension)

RACF Resource Access Control Facility

RAD Rapid Application Development

RADAR Radio Detection And Ranging +

Rights, Availabilities, Distribution Analysis

and Reporting [Disney]

RADB Routing Arbiter Data Base

RADIUS Remote Authentication Dial-In User Service

RADSL Rate Adaptive Digital Subscriber Line

RAG Row Address Generator

RAID Redundant Arrays of Independent Disks +

Redundant Arrays of Independent Drives +

Redundant Arrays of Inexpensive Disks

RAIS Redundant Arrays of Inexpensive Systems

RALU Register Arithmetic Logic Unit

RAM Random Access Memory

.RAM Real Audio Metafile (file name extension)

RAMDAC Random Access Memory Digital-to-Analog

Converter [Sierra]

RAMP Remote Access Maintenance Protocol [Internet]

RAND Random

RAP Rapid Application Prototyping

RARP Reverse Address Resolution Protocol

RAS Random Access Storage +

Reader Admission System [British Library] +

Reliability, Availability and Serviceability +

Remote Access Service + Row Address Select

RASAPI Remote Access Service Application Programming

Interface [Microsoft]

.RAT Rating (file name extension)

RAVE Rendering Acceleration Virtual Engine [Apple Computer]

.RAW Raw Data (file name extension)

RB Right Button (of 2 or 3 button Mouse)

RBBS Remote Bulletin Board System

RBCS Remote Bar Code System

RBOC Regional Bell Operating Company

.RC Resource (file name extension)

RCL Rotate Carry Left

RCP Remote Control Panel + Remote Copy [Internet] +

Restore Cursor Position

RCPT Recipient

RCR Rotate Carry Right

RCS Records Communications Switching System +

Revision Control System [Unix]

RD Receive Data + Remove Directory

R&D Research and Development

RDA Remote Database Access

RDB Receive Data Buffer + Relational Database

RDBMS Relational Database Management System

RDCLK Received Timing Clock

RDF Resource Description Framework [W3C]

RDO Remote Data Object

RDP Reliable Datagram Protocol + Remote Desk Protocol

RDRAM Rambus DRAM

RDSR Receiver Data Service Request

RDTO Receive Data Transfer Offset [IBM]

RDX Realistic Display Mixer

.REC Recorder (file name extension) +

Recreational or Entertainment Activities (Domain

Name) [Internet]

REC. Recreation [USENET Newsgroup Category]

.REF Reference (file name extension)

REG Register

REGAL Rigid Epoxy Glass Acrylic Laminate

RELSECT Relative Sector

REM Remark + Remote + Ring Error Monitor

REN Rename + Ringer Equivalence Number

REP Repeat

REPE Repeat while Equal

REPNE Repeat while Not Equal

REPNZ Repeat while Not Zero

REPZ Repeat while Zero

REQ Request

REREG Re-Register

RES Remote Execution Service + Reset + Resolution

.RES Resource (file name extension)

RET Resolution Enhancement Technology [HP] + Return

RETR Retrieve

REX Relocatable Executable

REXEC Remote Execution

REXX Restructured Extended Executor (language) [IBM]

RF Radio Frequency

RFC Request For Comments [Internet]

RFD Request for Discussion [Internet]

RFI Radio Frequency Interference + Request for Information

RFID Radio Frequency Identification

RFP Request for Proposal

RFQ Request for Quotation

RFS Remote File Sharing + Remote File System

RFT Revisable Form Text + Rich Text Format

RFU Reserved For Future Use

RGB Red-Green-Blue (color model)

RI Referential Integrity + Ring Indicate

RID Relative Identifier

RIFF Resource Interchange File Format [Microsoft]

RIM Remote Installation and Maintenance [Microsoft]

RIME RelayNet International Message Exchange

RIP Raster Image Processor + Remote Imaging Protocol +

Routing Information Protocol [Novell]

RIPEM Riordan's Internet Privacy Enhanced Mail

RIPS Raster Image Processing System

RISC Reduced Instruction Set Computing

RIT Raw Input Thread [Microsoft]

RJE Remote Job Entry

RLD Received Line Detect

RLE Run Length Encoded

RLL Run Length Limited

RLN Remote LAN Node [DCA]

RLOGIN Remote Login

RLSD Received Line Signal Detected

RLSI * Ridiculously Large-Scale Integration

RM Reset Mode

RMA Return Material Authorization +

Return to Manufacturer Authorization

RMB Right Mouse Button

RMDIR Remove Directory

RMI Remote Messaging Interface +

Remote Method Invocation [Sun]

RMON Remote Monitor/Monitoring

RMP Remote Maintenance Processor [IBM]

RMS Record Management Services + Root Mean Square

RMW Read-Modify-Write

RN Read News [Internet]

RNA Remote Network Access [Microsoft]

RND Random

RNG Random Number Generator

RNP Regional Network Provider

R-O Read Only

ROB Reorder Buffer [Intel]

ROI  Return On Investment

ROL Rotate Left

ROLAP Relational On-Line Analytical Processing

ROM Read Only Memory

ROOM Real-Time Object-Oriented Modeling

ROP Raster Operation + RISC Operation

ROR Rotate Right

ROS Read-Only Storage [IBM]

ROSCOE Remote Operating System Conversational Online

Environment

ROT Running Object Table

RPC Remote Procedure Call

RPG Report Program Generator (Programming Language)

RPL Resident Programming Language +

Requested Privilege Level

RPN Real Page Number + Reverse Polish Notation

RPRINTER Remote Printer [NetWare]

RPPROM Reprogrammable PROM

RPR Relative Performance Rating

RPT Repeat

RPQ Request for Price Quotation

RQBE Relational Query By Example [Fox Pro]

RR Real Reality

RS Radio Shack +

Recommended Standard (as in RS-232) [EIA] +

Record Separator + Request to Send

RSA129 (129 digit cryptographic security number named after

its inventors: Drs. Ronald L. Rivest, Adi Shamir and

Leonard M. Adleman)

RSAC Recreational Software Advisory Council

RSCS Remote Spooling Communications System

RSD Route Server Daemon

RSH Remote Shell

RSI Repetitive Strain Injury (Carpal Tunnel Syndrome)

RSL Request-and-Status Link

RSP Required Space Character

RSPX Remote Sequenced Packet Exchange

RST Reset + Restart

RSTS Resource Sharing Time Sharing [Digital]

RSVP Resource Reservation Protocol

RSX Realistic Sound Experience +

Real Time Resource Sharing Executive

RT Real Time + RISC Technology + Run Time

R/T Receive/Transmit

RTAM Remote Terminal Access Method

RTC Real-Time Clock

RTDM Real-Time Data Migration

RTEL Reverse Telnet [Internet]

RTF Rich Text Format

RTL Register Transfer Language/Level +

Resistor Transistor Logic + Right-To-Left +

Run Time Library

RTM Response Time Monitor + Runtime Manager [Borland]

RTMP Routing Table Maintenance Protocol

RTN Reuters Transaction Network

RTOS Real-Time Operating System

RTP Rapid Transport Protocol + Real-Time Protocol

RTS Remote Takeover System + Request To Send

RTSP Real-Time Streaming Protocol

RTTI Runtime Type Information

RTTY Radio Teletypewriter (Communications)

RTV Real Time Video

RTX Run Time Extension

RUN Rewind/Unload [IBM]

RVA Relative Virtual Address

RVI Reverse Interrupt

R/W Read/Write

RWIN Receive Window

RWM Read-Write Memory

RX Receiver

RXD Receive Data

S...

SA Selective Availability

SAA Systems Application Architecture [IBM]

SABRE Semi-Automatic Business Research Environment

SAC Single Attachment Concentrator

SACL System Access Control List

SADL Synchronous Data Link Control [Racal-Vadic]

SAINT * Symbolic Automatic Integrator

SAL Shift Arithmetic Left

SAM Serial Access Memory + Sequential Access Method +

Security Accounts Manager [Microsoft] +

Single Application Mode [Microsoft]

SAN Storage/System Area Network

SANE Standard Apple Numeric Environment

SAP Second Audio Program + Service Access Point [DEC] +

Service Advertising Protocol +

* Symbolic Assembly Program +

Systems, Applications and Products (company)

SAPI Speech Application Program Interface [Microsoft]

SAR Segmentation and Reassembly +

Shift Arithmetic Right +

Successive Approximation Register +

Synthetic Aperature Radar

SAS Sales Accounting System + Single Attached Station +

Single Audio System + Statistical Analysis System

SASI Shugart Associates System Interface (SCSI originated

from SASI)

SATAN Security Administrator Tool for Analyzing Networks

.SAV Saved (file name extension)

SAVDM Single Application VDM

SB Sound Blaster [Creative Labs] + Sound Board

SBA Scene Balance Algorithms [Kodak]

SBB Subtract With Borrow

SBC Single-Board Computer

SBCS Single-Byte Character Set

SBI Sound Blaster Instrument

.SBR Source Browser (file name extension) [Borland]

SBS Smart Battery Specification [Duracell/Intel]

.SC script (file name extension)

SCADA Supervisory Control and Data Acquisition

SCAM SCSI Configuration Automatically

SCAS Scan String

SCB Subsystem Control Block [IBM]

SCC Serial Communicatio, ns Controllers +

Serial Controller Chip +

Synchronous Channel Check [IBM]

SCCS Source Code Control System

SCD Standard Color Display

S-CDMA Synchronous Code-Division Multiple Access

SCF System Control Facility

SCI Scalable Coherent Interface +

Serial Communications Interface

SCI. Science [USENET Newsgroup Category]

SCIL Serial Control Interface Logic

SCLM Software Configuration and Library Management [IBM]

SCM ScreenCam Format [Lotus] +

Software Configuration Management + Station Class Mark

SCO Santa Cruz Operation (Software Company)

SCOPE Simple Communications Programming Environment

[Hayes]

SCP Save Cursor Position + Subsystem Control Port +

System Control Program

SCR Silicon Controlled Rectifier

.SCR script (file name extension)

SCRN Screen (video display)

SCRS Scalable Cluster of RISC Systems

SCSA Signal Computing System Architecture [Dialogic]

SCSI Small Computer Systems Interface

SD Send Data + Super Density

SDA Software Disk Array + Source Data Automation +

System Display Architecture [Digital]

SDAM Single DOS Application Mode

SDB Symbolic Debugger [Unix]

SDD Software Description Database [Internet] +

Subscriber Data document +

System Distribution Directory

SDF Space Delimited File + Space Delimited Format

.SDF Standard Data Format (file name extension)

SDH Synchronous Digital Hierarchy

SDI Selective Dissemination of Information +

Single document Interface

Software Development Interface [Mosaic]

SDK Software Development Kit [Microsoft]

SDL Specification and Description Language

SDLC Synchronous Data Link Control (protocol)

SDM System Development Multitasking

SDMS SCSI Device Management System [NCR]

SDN Software Defined Network [AT&T]

SDNS Secure Data Network Service

SDR Streaming Data Request

SDRAM Synchronous DRAM

SD-ROM Super Density ROM

SDS Sysops Distribution System

SDSL Single-Line/Symmetric Digital Subscriber Line

SD_STB Streaming Data Strobe [IBM]

SDTV Standard Definition Television

SDV Switched Digital Video [AT&T]

SDX Storage Data Acceleration

SEA Standard Extended Attribute [OS/2]

.SEA Self Extracting Archive (file name extension) [Macintosh]

SEAC * Name of first computer to use transistors, built by

(National Bureau of) Standards Eastern Automatic

Calculator (Also see SWAC)

SEAL Segmentation and Reassembly Layer (protocol) +

Screening External Access Link [Digital-DEC]

SEC Single Error Correction

SECAM Sequentiel Couleur Avec Memoire

(Sequential Color With Memory)

SECC Single Edge Contact Cartridge

SED Stream Editor + Stream-Oriented Editor

SEG Segment

SEH Structured Exception Handling

SEL Select

SEM Scanning Electron Microscope +

Standard Electronic Module +

Strategic Enterprise Management [SAP]

SEPP Secure Encryption Payment Protocol

SER Serial

SERCOS Serial Real-Time Communications System

SET Secure Electronic Transaction +

Softwave Engineering Technology

.SET Driver Set (file name extension) [Lotus 1-2-3] [LDC] +

Image Settings (file name extension) [Paradox]

SETEXT Structure Enhanced Text [Internet]

SEU Smallest Executable Unit

SF Sign Flag

SFC System File Checker

SFD Start Frame Delimiter

SFDR Spurious-Free Dynamic Range

SFN Short File Name

SFQL Structured Full-text Query Language

SFS System File Server

SFT System Fault Tolerance

SFX Sound Effect(s)

SGA Shared Global Area

SGEN Signal Generator + System Generator

SGDT Store Global Descriptor Table

SGI Silicon Graphics, Inc.

SGM Shaded Graphics Modeling

SGML Standard Generalized Markup Language

SGR Set Graphics Rendition

SGRAM Synchronous Graphics RAM

S/H Sample and Hold

SHA Secure Hash Algorithm [NSA]

SHAR Shell Archive

SHED Segmented Hypergraphic Editor

SHG Segmented Hypergraphics

SHL Shift Logical Left

SHR Shift Logical Right

SHTML Server-Side Include HyperText Markup Language

S-HTTP Secure Hypertext Transfer Protocol

SHV Standard High-Volume

.SHW Show (file name extension)

SI Shift-In + Source Index + System Information +

System Integration

SIC Standard Industrial Code

SID Security Identifier + Serial Input Data +

Station Identification [AT&T] +

Symbolic Interactive Debugger + System ID

SIDF System Independent Data Format

SIDH System Identification for Home Systems

SIDT Store Interrupt Descriptor Table

SIFT Stanford Information Filtering Tool

SIG Special Interest Group

SIGCAT Special Interest Group on CD-ROM Applications

and Technology

SIM Simulator

SIMD Single Instruction, Multiple Data-stream (processor)

SIMM Single In-line Memory Module

SIMTEL Simulation and Teleprocessing

SIMULA Simulation (language)

SIO Serial Input/Output (communications driver)

SIP Session Initiation Protocol + Single In-line Package

SIPC Simply Interactive Personal Computer [Microsoft]

SIPO Serial In, Parallel Out

SIPP Single In-line Pin Package

SIR Serial Infrared [Hewlett-Packard]

SIRDS Single-Image Random Dot Stereogram

SI/SO Serial In/Serial Out + Shift In/Shift Out

SIT Special Information Tones

.SIT Stuff-It (compressed file name extension) [Macintosh]

SIU System Interface Unit

SKIP Simple Key-Management for Internet Protocols [Sun]

SKU# Stock Keeping Unit Number

SLA Service Level Agreement

SLC Subscriber Line Concentrator

SLDT Store Local Descriptor Table

SLED Single Large Expensive Disk

SLIC System Level Integration Circuit +

System Licensed Internal Code [IBM]

SLIM Structured Language for Internet Markup

SLIP Serial Line Interface Protocol

SLM Spatial Light Modulator

SLMR Silly Little Mail Reader

SLOSH Sea, Lake and Overland Surge from Hurricane (program)

SLP Service Location Protocol

SLSI Super Large-Scale Integration

SLSS Systems Library Subscription Service [IBM]

SLU Spoken Language Understanding

SM Set Mode + Shared Memory

SMART Self-Monitoring Analysis and Reporting Technology

SMB Server Message Block (protocol) [MII]

SMD Surface Mounted Device

SMDR Station Message Detail Recording

SMDS Switched Multimedia/Multi-Megabit Data Service

SMF Single Mode Fiber + System Manager Facility [Compaq]

SMI System Management Interrupt [Intel]

SMIF Standard Mechanical Interface

SMIL Synchronized Multimedia Integration Language

S-MIME Secure MIME

SMIT System Management Interface Tool [IBM]

SMK Software Migration Kit [Microsoft]

SML Standard Meta Language

SMM System Management Mode [Intel]

SMOBC Solder Mask Over Bare Copper

SMP Simple Management Protocol + Symbolic Manipulation

Program + Symmetrical Multi-Processing +

Symmetric Multiprocessor

.SMP Sample (file name extension)

SMPC Shared Memory Parallel Computer

SMPS Switching Mode Power Supply

SMRAM System Management Random Access Memory

SMS Small Messaging System +

Storage Management Services [NetWare] +

Storage Management Subsystem/System +

Systems Management Server [Microsoft]

SMSW Store Machine Status Word

SMT Station Management (protocol) +

Surface-Mount Technology

SMTP Simple Mail Transfer Protocol

SMU System Management Utility

SN Serial Number

S/N Signal-to-Noise (Ratio)

SNA Systems Network Architecture [IBM]

SNAP Sub-Network Access Protocol +

Sub-Network Attachment Point

SND Sound

SNEWS Secure News Server [Internet]

SNMP Simple Network Management Protocol

SNOBOL String Oriented Symbolic Language (Programming Language)

SNP Serial Number/Password [Omen Technology]

SNR Signal-to-Noise Ratio

SOA Start Of Authority

SOC System On a Chip

SOC. Social Issues [USENET Newsgroup Category]

SOCKS Socket Secure (server) [Internet]

SO-DIMM Small Outline DIMM

SOE Standard Operating Environment

SOH Start of Header

SOHO Small Office/Home Office

SOL Simulation Oriented Language

SOM Start of Message + System Object Model [IBM]

SONET Synchronous Optical Network

SOP Small Outline Package + Standard Operating Procedures

SOS Silicon On Sapphire + Sophisticated Operating System +

Standards and Open Systems

SOTA State Of The Art

SOX Sound Exchange

SP Service Pack [IBM] + Stack Pointer + System Product

SPA Secure Password Authentication [Microsoft] +

Software Publishers Association

SPAN Space Physics Analysis Network

SPARC Scalable Processor Architecture +

Sun's Palo Alto Research Center

SPC Small Peripheral Controller + Statistical Process Control

SPCL Spectrum Cellular Corporation

SPCS Stored Program Controlled Switch

SPD Serial Presence Detect

SPEC Systems Performance Evaluation Cooperative

SPF Shortest Path First + System Programming Facility

SPGA Staggered Pin-Grid Array

SPI Security Parameters Index + Service Provider Interface +

SCSI Parallel Interface

SPID Service Profile/Provider Identifier

SPIKE Science Planning Intelligent Knowledge-Based

Environment [STScI]

SPIRES Stanford Public Information Retrieval System

[Stanford University]

SPL Spooler + System Programming Language [HP]

.SPL Spell Checker (file name extension)

SPLD Simple Programmable Logic Device

SPM System Performance Monitor [IBM]

SPOOL Simultaneous Peripheral Operations On Line

SPOT Shared Product Object Tree [IBM]

SPP Sequenced Packet Protocol + Standard Printer Port

SPPS Scalable Power Parallel System [IBM]

SPR Special Purpose Register +

Statistical Pattern Recognition +

Symmetrical Phase Recording

SPREAD * Systems Programming, Research, Engineering

and Development [IBM]

SPS Secure Packet Shield + Shock Protection System +

Standby Power System

SPSS Statistical Package for the Social Sciences

SPT Sectors Per Track

SPX Sequenced Packet Exchange [Novell]

SQ Squeezed (files)

SQE Signal Quality Error (test)

SQL/DS Structured Query Language/Data System [IBM]

SQOS Secure Quality Of Service

SQRT Square Root

SR Shift Register

SRAM Shadow Random Access Memory +

Static Random Access Memory

SRAPI Speech Recognition API

SRB Source-Route Bridge

.SRC Source (file name extension)

SRD Screen Reader System

SRDRAM Self-Refreshed DRAM

SRGB Sustained RGB (values)

SRM Security Reference Monitor

SRO Sharable and Read Only

SRP Suggested Retail Price

.SRP script (file name extension)

SRPI Server-Requester Programming Interface

SRQ Service Request

SRR Serially Reusable Resource

SRS Sound Retrieval System

SS Stack Segment + Single Sided + Seconds

SSA Serial Storage Architecture

SSAP Source Service Access Point

SSCP Systems Service Control Point [IBM]

SSD Solid State Disk

SSEC * Selective Sequence Electronic Calculator [IBM]

SSGA System Support Gate Array

SSH Secure Shell (protocol)

SSI Server Side Includes + Single System Image +

Small Scale Integration

SSL Secure Sockets Layer

SSPI Security Service Provider Interface [Microsoft]

SSRP Simple Server Redundancy Protocol [Cisco]

SST Spread-Spectrum Technology +

Systems Services and Technology

STA Spanning Tree Algorithm

STAR Self Defining Text Archival

STB Strobe

STC Set Carry Flag

STD Set Direction Flag + Standard

STDA StreetTalk Directory Assistance [Banyan]

STDAUX Standard Auxilary

STDERR Standard Error

STDIN Standard Input

STDIO.H Standard Input/Output Header [C Programming Language]

STDM Statistical Time Division Multiplexer

STDOUT Standard Output

STDPRN Standard Printer

STEP Standard for Exchange of Product

.STF Structured File (file name extension) [Lotus Agenda]

STI Set Interrupt Flag

S/TK Sectors Per Track

STL Standard Template Library

STN Super-Twist Nematic

.STORE Businesses Offering Goods (Domain Name) [Internet]

STOS Store String

STP Secure Transfer Protocol + Shielded Twisted Pair (cable) +

Signal Transfer Point +

Synchronized Transaction Processing

STR Store Task Register + Synchronous Transmitter Receiver

STRESS Structural Engineering System Solver (Programming

Language)

STRUDL Structural Design Language (Programming Language)

STScI Space Telescope Science Institute

STT Secure Transaction Technology [Microsoft]

STX Start of Text

.STY Style (file name extension) [Ventura, Word, WordPerfect]

SUB Subroutine + Substitute + Subtract

SUN Sun Microsystems, Inc.

.SUP Supplemental Dictionary (file name extension)

[WordPerfect]

SVC Switched Virtual Circuit

SVF Simple Vector Format

SVG Scalable Vector Graphics

SVGA Super Video Graphics Array

S-VHS Super VHS

SVM System Virtual Machine [Microsoft]

SVN Switched Virtual Network [IBM]

SVR Server

SVR# System V Release Number [AT&T]

S/W Software

SWAC * Mobile version of SEAC, built for deployment to White

Sands, and named Standards Western Automatic Calculator

SWAIS Simple Wide Area Information Server [Internet]

SWAP Shared Wireless Access Protocol

SWIG Simplified Wrapper and Interface Generator

SWISH Simple Web Indexing System for Humans

SWP Simple Web Printing

.SWP Swap (file name extension)

.SYL Syllabus (file name extension)

SYLK Symbolic Link

.SYM Symbols (file name extension)

.SYN Synonym (file name extension)

SYNC Synchronous

SYS System

.SYS System Configuration (file name extension) +

System Device Driver (file name extension)

SYSADMIN System Administrator

SYSGEN System Generator

SYSLOG System Log

SYSMOD System Modification

SYSOP System Operator

SYSREQ System Request

SZ Send ZModem [Unix]

T...

TAB Tape Automated Bonding

TACS Total Access Communication System

TAD Telephone Answering Device

TAP Telelocator Alphanumeric Protocol

TAPCIS The Access Program for the CompuServe

Information Service

TAPI Telephony Applications Programming Interface

.tar Tape Archive (archived file name extension) [Unix]

.tar.Z Compressed Archived files (file name extension) [Unix]

TAS Telephone Access Server

TASM Turbo Assembler [Borland]

TAXI Transparent Asynchronous Transceiver/Receiver Interface

TB Terabyte (1,024 gigabytes)

(One Thousand Billion characters of information)

T/B and

TBBS The Bread Board System (BBS)

TBGA Tape Ball Grid Array

.TBK Toolbook (file name extension)

TBU Tape Backup Unit

TC Test Control + Transmission Control

TCL Tool Command Language

TCM Trellis-Coded Modulation

TCO Total Cost of Ownership

TCP Tape-Carrier Package

TCP/IP Transmission Control Protocol/Internet Protocol

TD Transmit Data

TDC Tabular Data Control

TDD Telecommunications Device for the Deaf

TDtoDP Tablet Coordinates to Display Coordinates

(converting)

TDE Terminal Display Editor

.TDF Trace Definition File (file name extension) [OS/2] +

Typeface Definition File (file name extension)

TDI Transport Device Interface

TDM Technical document Management +

Time Division Multiplexing

TDMA Time Division Multiple Access

TDMS Terminal Display Management System

TDP Tag Distribution Protocol [Cisco] +

Telelocator Data Protocol

TDSR Transmitter Data Service Request

TDR Time Domain Reflectometry

TE/2 Terminal Emulator/2 [Oberon]

TEB Thread Environment Block

TEC Tokyo Electronics Corporation

TED Tiny Editor

TEI Terminal Endpoint Identifier

TELCO Telephone Company

TEML Turbo Editor Macro Language [Borland]

TEMP Temporary

TER Thermal Eclipse Reading [Sony]

TERMPWR Terminator Power

TFDD Text File Device Driver

TFEL Thin-Film Electroluminescent

.TFM Tagged Font Metric (file name extension)

TFT Thin-Film Transistor (screens)

TFTP Trivial File Transfer Protocol

THD Total Harmonic Distortion

.THD Thread (file name extension)

THOMAS The (U.S.) House (of Representatives) Open Multimedia

Access System

THOR Tandy High-Performance Optical Recording

THR Transmit Holding Register

.THS Thesaurus (file name extension)

TI Texas Instruments, Inc.

TIA Telecommunications Industry Association +

The Internet Adapter [Internet]

TID Target ID

TIES Time Independent Escape Sequence

.TIF Tagged Image File (filename extension)

TIFF Tagged Image File Format

TIGA Texas Instruments Graphics Architecture

TIGER ologically Integrated Geographic Encoding

and Referencing

TIIAP Telecommunications and Information Infrastructure

Assistance Program [NII]

TIM Technical Information Memo [Compaq]

TIMEZONES - - - - - - - - - - - - - - - - - GMT Offsets

Offsets Eastward from GMT (+)

Offsets Westward from GMT (-)

AST - Atlantic Standard Time -4:00

AT - Azores Time -2:00

AHD - Alaska-Hawaii Daylight :::

AHS - Alaska-Hawaii Standard -10:00

BLT - Baghdad Local Time +3:00

BST - British Summer Time :::

CAT - Central Alaska Time -10:00

CCT - China Coast Time +8:00

CDT - Central Daylight Time :::

CET - Central European Time +1:00

CLT - Cairo Local Time +2:00

CST - Central Standard Time -6:00

EAD - East Australian Daylight :::

EAS - East Australian Standard +10:00

EDT - Eastern Daylight Time :::

EET - Eastern European Time +1:00

EMT - Eastern Mediterranean +2:00

EST - Eastern Standard Time -5:00

GMT - Greenwich Mean Time +0:00

HST - Hawaii Standard Time -10:00

JST - Japanese Standard Time +9:00

MDT - Mountain Daylight Time :::

MET - Middle European Time +1:00

MST - Mountain Standard Time -7:00

MTS - Moscow Time Standard +3:00

MTD - Moscow Time Daylight :::

NT - Nome Time -11:00

NZT - New Zealand Time +12:00

PDT - Pacific Daylight Time :::

PST - Pacific Standard Time -8:00

PST - Pakistan Standard Time +5:00

WAS - West Australian Standard +7:00

WAT - West Africa Time -1:00

WED - Western Europe Daylight :::

WES - Western Europe Standard +0:00

YDT - Yukon Daylight Time :::

YST - Yukon Standard Time -9:00

IDLE- International Date Line East +12:00

IDLW- International Date Line West -12:00

TIMI Technology Independent Machine Interface [IBM]

TIMS Text Information Management Systems

TINA Telecommunication Information Networking Architecture

TIP Terminal Interface Processor +

Transaction Internet Protocol

TITOFET Tunneling-In, Tunneling-Out Field Effect Transistor

TK/TK Track to Track

TLA Three-Letter Acronym

TLB Translation Lookaside Buffer

.TLB Table (file name extension)

TLD Level Domain

TLI Transport Layer Interface

TLS Transport Layer Security

TLU Table Lookup

.TLX Telex (file name extension)

TM Trademark

TMDS Transition Minimized Differential Signaling

.TML Template (file name extension)

TMP Temporary

TN Twisted Nematic

TNC Terminal Node Controller

TNO The Netherlands Organization

ToC Table Of Contents

TOD Time Of Day

Technical and Office Protocol

TPC Transaction-Processing Performance Council

TPF Transactions Processing Facility [IBM]

TPI Tracks Per Inch

TPL Table Producing Language +

Transaction Processing Language

TPM Transactions Per Minute

TPORT Twisted Pair Port Transceiver [AT&T]

TPS Transactions Per Second +

Transaction Processing System

TPW Turbo Pascal for Windows

TQFP Thin Quad Flat Pack

TQM Total Quality Management

TR Terminal Ready

T/R Transmit/Receive

TRACERT Trace Route [Microsoft]

TRADIC * Transistorized Airborne Digital Computer

(Name of first computer to be entirely

transistorized)

.TRM Terminal (file name extension)

TRN Threaded Read News [Internet] + Token Ring Network

TRON The Real-Time Operating System Nucleus

TS Secret

TSA Target Service Agent + Technical Support Alliance +

Telephony Services Architecture

TSAPI Telephony Services Application Program

Interface [AT&T + Novell]

TSB Termination Status Block

TSD Type-Specific Driver

TSE The Semware Editor

TSO Time Sharing Option

TSP Telephony Service Provider

TSR Terminate and Stay Resident

TSS Task State Segment + Time Sharing System

TS/SI Secret/Sensitive Information

.TST Test (file name extension)

TSTN Triple Supertwisted Nematic

TSV Tab Separated values

TT Typewriter Text

TTA Transport-Triggered Architecture

TTCN Tree and Tabular Combined Notation

.TTF TrueType Font (file name extension)

TTL Transistor-Transistor Logic

TTP Thermal-Transfer Printing

TTS Text-To-Speech + Transaction Tracking System

TTY Teletype

TUCOWS The Ultimate Collection of Winsock Software

TUI Text-Based User Interface [WordPerfect]

TUMS Table Update and Management System [Stanford University]

.TUT Tutorial (file name extension)

TVF Table of contents Verbosely from File [UNIX]

TVFS Toronto Virtual File System [IBM]

TVI Television Interference

TVOL Television On-Line

TWAIN Technology Without Any Interesting Name

(connection between application and scanner software)

TWX Teletypewriter Exchange Service

TXD Transmit Data

.TXF Tax Exchange Format (file name extension)

TXT Text

TXT2STF Text To Structured File [Lotus Agenda]

TZ Time Zone [Unix]

U...

UA User Agent + User Area

UAE Unrecoverable Application Error

UAM User Authentication Method

UART Universal Asynchronous Receiver/Transmitter

UBR Unspecified Bit Rate

.UC2 Compressed File (file name extension) [UltraCompressor]

UCE Unsolicited Commercial Email

UCL Universal Communications Language

UCS Unicode Conversion Support + Universal Character Set +

User Coordinate System

UCT Universal Coordinated Time

UDA Universal Data Access [Microsoft]

UDB Universal Data Base

UDC Universal Decimal Classification + User Defined Commands

UDD User Data document

UDE Universal Data Exchange

UDEC * Universal Digital Electronic Computer [Burroughs]

UDF Universal Disk Format + User Defined Functions

UDG User Defined Gateway

UDP User Datagram Protocol

UDT Uniform Data Transfer + User-Defined Type

UFS Unix File System

UG User Group

UHCI Universal Host Controller Interface

UHF Ultra-High Frequency

UHL Universal Hypertext Link

UI Unix International + User Interface

UIC User Identification Code

UID User Identifier

UIMS User Interface Management System

UL Underwriters Laboratories +

Unordered List + Upload

ULA Uncommitted Logic Array

ULN Universal Link Negotiation

ULSI Ultra Large Scale Integration

UMA Unified Memory Architecture

UMB Upper Memory Block [LIM/AST]

UML Unified Modeling Language

UMTS Universal Mobile Telecommunications System

UNC Universal Naming Convention +

Uuencoded Netnews Collator [Unix]

UNCOL Universal Computed Oriented Language

UNI User-Network Interface

UNICOM Universal Integrated Communication (System)

UNICOS Universal Compiler FORTRAN compatible

UNII Unlicensed National Information Infrastructure

UNIVAC Universal Automatic Computer

UNIX (AT&T Bell Laboratories Operating System)

UNMA Unified Network Management Architecture

UP Uniprocessor

UPC Universal Product/Program Code + User Parameter Control

UPG Upgrade

UPL User Program Language

UPM Unix Programmer's Manual +

User Profile Management [IBM]

UPS Uninterruptible Power Supply/System

URC Uniform Resource Characteristics +

Uniform Resource Citation

UREP Unix RSCS Emulation Protocol (protocol)

URI Uniform Resource Identifier

URL Uniform Resource Locator

URN Uniform Resource Name/Number

US Unit Separator

USART Universal Synchronous-Asynchronous Receiver/Transmitter

USB Universal Serial Bus [Intel]

USENET User's Network [Internet]

USERID User Identification

USOC Universal Service Ordering Code

USQ Unsqueezed (files)

USR US Robotics (corporation)

USRT Universal Synchronous Receiver/Transmitter

USSA User Supported Software Association (United Kingdom)

UT User Terminal

UTC Coordinated Universal Time

UTI Universal Text Interchange/Interface

UTP Unshielded Twisted-Pair (cable)

UU Uuencode/Uudecode

UUCP Unix-To-Unix Copy Program

UUD UUDecoding [Unix]

UUDECODE Unix-To-Unix Decoding

UUE UUEncoding [Unix]

UUENCODE Unix-To-Unix Encoding

UUI User-To-User Information [AT&T]

UUID Universal Unique Identifier

UV Ultraviolet

V...

VA Virtual Address + Visual Age [IBM]

VAD value Added Dealer

VADD value Added Disk Driver

VADSL Very-High-Rate Asymmetric Digital Subscriber Line

VAL value + Voice Application Language

.VAL Validity Checks (file name extension) [Paradox]

VAM Virtual Access Method

VAN value Added Network

VAP value Added Process

VAR value Added Reseller + value Added Retailer + Variable

VAST Variable Array Storage Technology

VAX/VMS Virtual Address Extension/Virtual Memory System [DEC]

VB Variable Block + Visual Basic [Microsoft]

VBA Visual Basic for Applications [Microsoft]

VBE/AI Vesa Bios Extension/Audio Interface

VBI Vertical Blanking Interval

VBNS Very High Speed Backbone Network Service [MCI + NSF]

VBR Variable Bit Rate

VBRUN Visual Basic Runtime

vbs Visual Basic script

.VBX Visual Basic Extension (file name extension)

VCC Virtual Channel Connection

VCD Virtual Communications Driver

VCI Virtual Circuit Identifier

VCL Visual Component Library

VCN Virtual Cluster Number

VCOS Visual Caching Operating System [AT&T]

VCPI Virtual Control Program Interface

VCR Video Cassette Recorder

VDD Virtual Device Driver

VDDM Virtual Device Driver Manager

VDE Video Display Editor + Visual Development Environment

VDISK Virtual Disk

VDM Virtual DOS Machine [IBM]

VDMAD Virtual Direct Memory Access Device [Microsoft]

VDS Virtual DMA Services

VDSL Very-High-Data-Rate Digital Subscriber Line

VDT Video Dial Tone + Video Display Terminal

VDU Video Display Unit + Visual Display Unit

VEGA Video-7 Enhanced Graphics Adapter [Video-7, Inc.]

VEMM Virtual Expanded Memory Manager

VEMMI Versatile Multimedia Interface

VER Verify + Version

VERONICA Very Easy Rodent-Oriented Net-Wide Index to

Computer Archives [Internet]

VERR Verify Read Access

VERW Verify Write Access

VES Video Encoding Standard [Oracle]

VESA Video Electronics Standards Association

VF Virtual Floppy

VFAT Virtual File Allocation Table [Microsoft]

V.FC Version.First Class (communications standard)

VFD Vacuum Fluorescent Display

VFW Video For Windows [Microsoft]

VGA Video Graphics Array

VGC Video Graphics Controller

VHDL VHSIC Hardware Description Language

VHF Very-High Frequency

VHS Very High Speed + Video Home System +

Virtual Host Storage

VHSIC Very High Speed Integrated Circuit

VI Visual Interactive (editor) [UNIX]

VIA Virtual Interface Architecture [Intel]

VIE Virtual Information Environment

VIF Virtual Interface + Virtual Interrupt Flag

VIM Vendor Independent Mail +

Vendor Independent Messaging + Video Interface Module

VIO Video Input/Output + Virtual Input/Output

VINES Virtual Networking System [Banyan]

ViP Visual Programming [Lotus]

VIP Variable Information Processing +

Video Information Provider +

Virtual Interrupt Pending

VIPER Verifiable Integrated Processor for

Enhanced Reliability

VIS Video Information System [Tandy] +

Visual Instruction Set [Sun] +

Voice Information System

VJ HEADER Van Jacobsen Header (compression) [Unix]

VLAN Virtual Local Area Network

VL-BUS Vesa Local-Bus [VESA]

VLD Variable-Length Decoder

VLF Very Low Frequency

VLINK Visited Link [HTML]

VLIW Very Large Instruction Word

VLM Virtual Loadable Module

VLSI Very Large Scale Integration

VLSIPS Very Large Scale Immobilized Polymer Synthesis

VLT Variable List Table

VM Virtual Machine + Virtual Memory

VMA Virtual Memory Address

VMB Virtual Machine Boot

VME Versa Module Eurocard +

Virtual Memory Environment

VML Vector Markup Language [Microsoft]

VMM Virtual Machine/Memory Manager

VMOS Vertical MOS

VMP Virtual Modem Protocol

VMS Virtual Machine Storage + Virtual Memory System +

Voice Message System

VMT Virtual Memory Technique

VNA Virtual Network Architecture

VOC Creative Voice (format) [Sound Blaster]

VOD Video On Demand

VOIP Voice Over Internet Protocol

VOL Volume

VOM Volt-Ohm-Milliammeter

VOR Visions Of Reality

VOS Verbal/Voice Operating System

VP Virtual Path

VPD Virtual Printer Device + Vital Product Data [IBM]

VPDN Virtual Private Data Network

VPDS Virtual Private Data Service [MCI]

VPE Video Port Extensions [Microsoft] +

Visual Programming Environment

VPL Virtual Programming Language

VPM Video Port Manager

VPN Virtual Page Number + Virtual Private Network

VPS Voice Processing System

VPSC Vault, Process, Structure, Configuration

VPT Virtual Print Technology [Dataproducts]

VR Virtual Reality + Voltage Regulated/Regulator

VRAM Video Random Access Memory

VRD Virtual Retinal Display

VRE Voltage Regulated Extended

VRM Voltage Regulator Module

VRML Virtual Reality Modeling Language

(originally named Virtual Reality Markup Language)

VROOMM Virtual Real-time Object Oriented

Memory Manager [Borland]

.VRS WordPerfect Graphics Driver (file name extension)

VRT Voltage Regulation Technology [Intel]

VRU Voice Response Unit

VS Virtual Storage

VSAM Virtual Storage Access Method

VSAT Very Small Aperture Terminal

VSE Virtual Storage Extended

VSF Vertical Scanning Frequency

VSI Virtual Socket Interface

VSIO Virtual Serial Input Output

VSM Virtual Shared Memory + Virtual Storage Management +

Visual System Management [IBM]

VSN Volume Serial Number

VSOS Virtual Storage Operating System

VSYNC Vertical Sync

VT Vertical Tab

VTAM Virtual Telecommunications Access Method [IBM]

VTNS Virtual Telecommunications Network Service

VTS Volume Tracking Driver

VUI Video User Interface

VUP VAX Unit of Performance

VWB Visual WorkBench [Microsoft]

VWM Virtual Window Manager

VXA Variable-Speed Architecture [Ecrix]

VxD Virtual Extended Driver [Microsoft]

.VXD Virtual Device (file name extension) [Microsoft]

V&V Verification and Validation

W...

W/ With

W3 (see WWW)

W3A World Wide Web Applets

W3C World Wide Web Consortium

W4 What-Works-With-What

WAAS Wide Area Augmentation System

WABI Windows Application Binary Interface [SunSoft]

WAI Web Application Interface [Netscape]

WAIS Wide Area Information Server

WAITI Wait-For-Interrupt

WAITS Wide Area Information Transfer System

WAN Wide Area Network

WAP Wireless Application Protocol

WATS Wide Area Telecommunications Service

.WAV Waveform Audio (file name extension)

WBEM Web-Based Enterprise Management

WC Word Count

WCS World Coordinate System

WDL Windows Driver Library [Microsoft]

WDM Wavelength Division Multiplexing +

Windows Driver Model [Microsoft]

WDRAM Windows Dynamic Random Access Memory

.WEB Entities Emphasizing the WWW (Domain Name) [Internet]

WebNFS Web Network File System [Sun]

WELL Whole Earth 'Lectronic Link (BBS)

WFM Wired For Management [Intel]

WFW Windows For Workgroups [Microsoft]

WGS Work Group System

WHAM Waveform Hold and Modify [Microsoft]

WHC Workstation Host Connection

WIN 9.X Windows95/Windows98

WINDBG Windows Debugger [Microsoft]

WINE Windows Emulator

WINForum Wireless Information Networks Forum

WINS Windows Internet Naming Service [Microsoft]

WINSOCK Windows Open Systems Architecture [Microsoft] +

Windows Sockets

WINWORD Word For Windows [Microsoft]

WISE WordPerfect Information System Environment

WIT Web Interactive Talk [Internet]

.WKB Workbook (file name extension) [WordPerfect]

.WKE Worksheet (file name extension) [Lotus 1-2-3] [LDC]

.WKQ Spreadsheet (file name extension) [BORQU]

.WKS Worksheet (file name extension) [Lotus 1-2-3] [LDC]

.WKZ Compressed Spreadsheet (file name extension) [BORQU]

.WK1 Worksheet (file name extension) [Lotus 1-2-3] [LDC]

WL Word Line

.WLG Dr. Watson Log (file name extension)

WMC Workflow Management Coalition

.WMF Windows Metafile Format (file name extension) [Microsoft]

WMRM Write Many, Read Many

WNIC Wide-Area Network Interface Co-Processor

WNIM Wide-Area Network Interface Module

W/O Without

WORM Write Once, Read Many

WOS Workstation Operating System

WOSA Windows Open Services/Systems Architecture [Microsoft]

WOW Window On Windows [Microsoft]

WP WordPerfect + Word Processing + Write Protected

.WPD Windows Printer Description (file name extension)

.WPG WordPerfect Graphics (file name extension)

WPHD Write-Protect Hard Disk

.WPK Keyboard (file name extension) [WordPerfect]

WPM Words Per Minute

.WPM Macro (file name extension) [WordPerfect]

WPOS Workplace Operating System

WPS Windows Printing System [Microsoft] +

Workplace Shell [OS2]

WPVM Windows Parallel Virtual Machine

.WQ1 Spreadsheet (file name extension) [BORPQU]

.WQ! Compressed Spreadsheet (file name extension) [BORPQU]

WRAM Windows Random Access Memory

.WRI Write (file name extension)

WRK Windows Resource Kit [Microsoft]

WS WordStar + Workstation

WSAPI Web Site Application Program Interface [O'Reilly]

WSH Windows scripting Host [Microsoft]

WT Write Through

WTM Wired For Management

WWIS World Wide Information System [Internet]

WWW World-Wide Web [Internet]

WYSBYGI What You See Before You Get It

WYSIWYG What You See Is What You Get