.ADF Adapter Description File (file name extension)
ADI AutoCad Device Interface (driver)
ADL Address Data Latch
ADLAT Adaptive Lattice Filter
ADLC Adaptive Lossless Data Compression [IBM] +
Asynchronous Data Link Control
ADMACS Apple Document Mangagement And Conrol System
ADMD Administrative Management Domain [X.400]
.ADN Add In Utility (file name extension)
[Lotus
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
ADSL Asymmetrical Digital Subscriber Line
ADSR Attack, Decay, Sustain, Release
ADT Application Data Types
ADU Automatic Dialing Unit
AE Above or Equal
AEB Analog Expansion Bus [Dialogic]
AF Auxiliary carry Flag
AFA Accelerated File Access
AFC Automatic Font Change + Automatic Frequency Control
AFD Automatic File Distribution
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 Appletalk Filing Protocol [Macintosh]
AFS Andrew File System (protocols)
AFTP Anonymous File Transfer Protocol
AGC Automatic Gain Control
AGRAS Antiglare-Antireflective-Antistatic
AGU Address-Generation Unit
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
AIN Advanced Intelligent Network [
AIS Automated Identification System [NCIC]
AISB Association of Imaging Service Bureaus
AISP Association of Information Systems Professionals
AIX Advanced Interactive Executive [IBM]
ALC Arithmetic and Logic Circuits +
Automatic Level Control
ALE Address Latch Enable
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
AMANDDA Automated Messaging and Directory Assistance
AMD Active Matrix Display +
Advanced Micro Devices, Inc.
AMI 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
AO Analog Output
AOCE Apple Open Collaboration Environment
AOE Application Operating Environment [AT&T]
AOL
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
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 OS2]
.APP Application (file name extension) [R:Base]
APPC Advanced Program-to-Program Communications [IBM]
APPI Advanced Peer-to-Peer Internetworking
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
APT
Advanced Parallel Technology +
Automatically Programmed Tools
A/R Accounts Receivable
ARA AppleTalk Remote Access
ARAG Antireflective-Antiglare
.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 Copressor [IBM]
ARTS Asynchronous Remote Takeover Server
ARTT Asynchronous Remote Takeover Terminal
ARQ Automatic Repeat Request
ARU Audio Response Unit
AS Autonomous System [Internet]
ASAP As Soon As Possible +
Automatic Switching And Processing
AS3AP ANSI SQL Standard Scalable and Portable
.ASC ASCII text (file name extension)
ASCII American Standard Code for Information Interchange
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
ASP Association of Shareware Professionals
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,
AS/U Advanced Server for Unix
ASYNC Asynchronous
AT Advanced Technology + Attention
ATA Advanced Technology Attachment
ATDP Attention Dial Pulse
ATDT Attention Dial Tone
ATE Automated Test Equipment
ATG Advanced Technology Group
ATH Attention Hang-Up (Modem command)
ATM Adobe Typeface Manager +
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)
ATZ Attention Restore configuration profile from
nonvolatile RAM (Modem command)
.AU Audio (file name extension)
AUDIT Automated Data Input Terminal
AUI Attachment Unit Interface
AUP Acceptable Use Policy [Internet]
AUTO Automatic
AUTOEXEC Automatic Execution
AUX Auxiliary + (
AV Audio/Video + Audiovisual + Authenticity Verification
AVA Audio Visual Authoring [IBM]
AVC Audio Visual Connection [IBM]
AVG Average
AVI Audio Visual Interleave [Microsoft]
AVR Automatic Voice Recognition
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]
AX Architecture Extended + Automatic Transmission
(TOP) (UP to A) (DN to C) (BOTTOM)
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
BARTS
.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
BDE Borland Database Engine [Borland]
BDOS Basic Disk Operating System
BDR Bus Device Request
BE Below or Equal
BECN Backward Explicit Congestion Notification
BEDO Burst Extended Data Out
BEL
BELLCORE
BERT Bit Error Rate Test/Tester
BF Bad Flag
B/F Background/Foreground
BFF Binary File Format [IBM]
BFT Binary File Transfer
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
BIM Beginning of Information Marker
.BIN Binary (file name extension)
BINAC * Binary Automatic Computer
BIND
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
BIU Bus Interface Unit
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 Picture (file name extension)
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 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
BP Base Pointer
BPB BIOS Parameter Block
BPDU Bridge Protocol Data Unit
BPI Bits Per Inch
BPL Branch if Plus
BPS Bits Per Second + Bytes Per Second
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
BSR Bit Scan Reverse
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
BVH Base Video Handler
BWM Block-Write Mode
B2X Binary To Hexadecimal [REXX]
BYTE Binary Element String
(TOP) (UP to B) (DN to D) (BOTTOM)
C C Programming Language
.C C source code (file name extension) [C]
CA Collision Avoidance
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
CAEX Computer Aided Exploration
CAG Column Address Generator
CAI Computer Aided Instruction
Contents Addressable Memory
CAN Cancel
CAP Carrierless Amplitude and Phase-Modulation +
Central Arbitration Point +
Communication Application Platform +
Computer Aided Publishing
.CAP Capture (file name extension)
CAPD Computing To Assist Persons With Disabilities [Johns
CAPS Capitals (Upper Case Letters) +
Cassette Programming System
CARL
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 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
CBC Cipher Block Chaining
CBCR Channel Byte Count Register
CBEMA Computer and Business Equipment
Manufacturers Association
CBGA Ceramic Ball Grid Array
CBI Computer Based Instruction
CBL Computer Based Learning
.CBL COBOL source code (file name extension)
CBMS Computer-Based Mail System
CBR 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
CCITT Comite Consultatif International Telegraphique et Telephonique/
Consultative Committee for International Telegraph and Telephone
CCL Connection Control Language
CCP 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]
CDC Control Data Corporation
CD_CHRDY Card Channel Ready [IBM]
CD-DA Compact Disk -Digital Audio
CDDI Copper Distributed Data Interface
CDE Common Desktop Environment + Complex Data Entry
CD-E Compact Disk - Erasable
.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
CDPD Cellular Digital Packet Data
CDR Call Detail Record + Call Detail Recording
CD-R Compact Disk - Recordable
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
CDS Current Directory Structure
CDSA Common Data Security Architecture
.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
CEMS Constituent Electronic Mail System
CEOP Conditional End Of Page
CERN The European 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]
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 Common Gateway Interface + Computer Generated Images +
Computer Graphics Interface
.CGM Computer Graphics Metafile (file name extension) +
Graph (file name extension) [Lotus
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
.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
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
CIM CompuServe Information Manager +
Computer Integrated Manufacturing
CIO Chief Information Offier
CIOCS Communication Input/Output Control System
CIP
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
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
CLI Call-Level Interface + Clear Interrupt Flag +
Command Line Interface
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
CLTP Connectionless Transport Protocol
CLTS Clear Task Switch Flag
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 Mangement Configuration +
Complement Carry Flag +
Computer-Mediated Communication [Internet]
.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 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 Administrator [Novell]
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
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
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)
COLD Computer Output to Laser Disk
COLL Collision
COM Commercial (organization Domain name) [Internet] +
Common Object Model [Microsoft]
.COM Command (file name extension)
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
CORBA Common Object Request Broker Architecture
CoREN Corporation for Research and
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 Premise 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)
CP/M Control Program for Microcomputers [Digital Research]
CPS Characters Per Second + Cycles Per Second
CPT
CPU Central Processing Unit
CR Carriage Return
CRAM Cyberspatial Reality Advancement Movement
CRC Cyclic Redundancy Check
.CRD Cardfile (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
CROM Control Read Only Memory
CRT Cathode Ray Tube
CRTC CRT Controller
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 Packet 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 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 +
Commercial Subroutine Package +
CompuCom Speed Protocol [CompuCom]
CSPDN Circuit Switched Public Data Network
CSS * Continuous System Simulator (Language)
CSS Cascading Style Sheets [Microsoft] +
Contact Start-Stop
CSSM Client-Server Systems Management [IBM]
CSTA Computer-Supported Telephony Applications
CSU Channel Service 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
CTRL Control
CTS Clear To Send
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)
CUT Control Unit Terminal
CUTE
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)
(TOP) (UP to C) (DN to E) (BOTTOM)
D/A Digital to Analog
DAA Data Access Arrangement +
Decimal Adjust for Addition
DAC Data Acquisition and Control +
Digital to Analog Converter
DAD Desktop Application Director [Borland]
DAI Distributed Artificial Intelligence
DAL Data Access Language [Apple Computer] +
Disk Access Lockout
DAM Data Acquisition and Monitoring
DAO Data Access Object [Microsoft]
DAP Data Access Protocol [DEC] +
Developer Assistance Program
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
DAT Digital Audio Tape + Disk Array Technology
.DAT Data (file name extension)
DATACOM Data Communications
DAV Digital Audio-Video
dB Decibel
DB Data Base + Data Buffer
dBA Adjusted Decibel
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
DBS Data Base Server
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 Direct Chip Attach Module
DCB Device Control Block + Disk Coprocessor Board [Novell]
DCC 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]
DCP Digital Light Processing [TI]
DCS Data Collection System + Data Control System +
Desktop Color Separation + Distributed Control System
DCT Discrete Cosine Transform
.DCT Dictionary (file name extension)
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 + 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 Distributed Data Processing
DDS Digital Dataphone Service [AT&T] + Design Data Sheet +
Digital Data Storage + Distributed Database Services
DDX Digital Data Exchange
DE Device End
DEC Decrement + Device Clear + Digital Equipment Corporation
DECNET Digital Equipment Corporation Networking (protocol)
DEF Desktop Functional Equivalent [Compaq]
.DEF Definitions + Defaults (file name extensions)
DEFRAG Defragment
DEK Data Encryption Key
DELSTR Delete String [REXX]
.DEM Demonstration (file name extension)
DEN Document Enabled Networking [Novell-Xerox]
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
DFM Design For Manufacturability [IBM]
DFS Distributed File System
DFSMS Data Facility Storage Management Subsystem [IBM]
DFT Design For Testability + Diagnostic Funtion 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)
DI Data In + Destination Index
DIA Document Interchange Architecture [IBM]
DIB Device Independent Bitmap +
Directory Information Base
DIBOL DEC Business Oriented Language
.DIC Dictionary (file name extension)
DID Direct Inward Dialing
DIF Data Interchange Format
DIFFSENS Differential Sense
DIIP Direct
DIMM Dual-Inline 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 Dynamic Impedance Stabilization [CompuCom]
DISA Data Interchange Standards Association
DISP Displacement (offset)
DIT Directory Information Tree
DIV Divide
DIVE Direct Interface Video Extension [OS/2 Warp]
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]
DLCI Data Link Connection Identifier
DLD Display List Driver
DLE Data Link Escape
DLL Dynamic Link Library
DLM Dynamic Link Module
DLP Digital Light Processing [TI]
DLR DOS LAN Requester
DLT Digital Linear Tape
DM Distributed Memory
DMA Direct Memory Access/Addressing
DMAC DMA Controller
DMACS Distributed Manufacturing Automation & Control Software
DMD Digital Micromirror Device [TI]
DME Distributed Management Environment
DMF Distribution Media Format [Microsoft]
DMI Desktop Mangement 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
DMQS Display Mode Query and Set [IBM]
DMS Data Management Software + Data Management System
DMSD Digital Multistandard Decoding
DMT Digital Multi-Tone
DMTF Desktop 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)
DOE Distributed Objects Everywhere
DOIP Dial Other Internet Providers [IBM]
DO-IT Disabilities, Opportunities, Internetworking and
Technology
DOMF Distributed Object Management Facility
DOS Disk Operating System
DOSEM DOS Emulation
DOW Day Of Week
DP Data Processing
DPA Demand Protocol Architecture [3Com]
DPAM Demand Priority Access Method
DPAREN Data Parity Enable [IBM]
DPC Direct Program Control
DPI 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)
DQL DataEase Query Language [DataEase International]
DR Data Received
D/R Direct or Reverse
DRAM Dynamic Random Access Memory
DRAW Direct Read After Write
DR.BOND Dial-up Router Bandwith On Demand [NEC]
DRDA Distributed Relational Database Architecture [IBM]
DR-DOS Digital Research-Disk Operating System
DRDW Direct Read During Write
DRI Digital Research Incorporated
DRO Data Request Output + Destructive Read-Out
DRS Document Registration System
.DRS Driver Resource (file name extension) [WordPerfect]
.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 Directory System Agent
DSAP Destination Service Access Point
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
DSMA Digital Sense Multiple Access
DSOM Distributed System Object Model
DSP Digital Signal Processing/Processor +
Directory Synchronization Protocol [Lotus]
DSQD Double Sided, Quad Density (diskette)
DSR Data Set Ready + Device Status Register +
Device Status Report
DSS Decision Support System + Digital Signature Standard
DSSI Digital Standard Systems Interconnect [DEC]
DSSS Direct-Sequencing Spread Spectrum
DSTN Double Supertwisted Nematic
DSU Data Service Unit + Digital Service Unit
DSVD Digital Simultaneous Voice and Data
DSW Data Status Word + Device Status Word
D2T2 Dye Diffusion Thermal Transfer (printing)
DTA Disk Transfer Area
.DTA Data (file name extension)
DTC Desktop Conferencing
DTD Document Type Definition
DTE Data Terminal Equipment + Dumb Terminal Emulator
DTF Distributed Test Facility
DTL Dialog Tag Language [IBM] + Diode-Transistor Logic
DTMF Data Tone Multiple Frequency + Dual Tone Multifrequency
DTP Desktop Publishing + Distributed Transaction Process
DTR Data Terminal Ready + Data Transfer Rate
DTV Desktop Video
DTVC Desktop 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 DESQview Script (file name extension)
DVC Desktop Video Conferencing
DVD Digital Video Disk
DVE Digital Video Effect
DVI Digital Video Interactive
.DVI Device Independent (file name extension)
DVMRP Distance Vector Multicast Routing Protocol [Internet]
.DVR Device Driver (file name extension) (Also see .DRV)
DWG Drawing
D2X Decimal To Hexadecimal [REXX]
.DXB Drawing Interchange Binary (file name extension)
[AutoCAD]
DXC Data Exchange Control
DXF Drawing Exchange Format
(TOP) (UP to D) (DN to F) (BOTTOM)
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
EATA Enhanced AT Bus Attachment
EBC EISA Bus Controller
EBCT Electron Beam Computed Tomography
EBCDIC Extended Binary Coded Decimal Interchange Code [IBM]
EBI Equivalent Background Input +
Extended Background Investigation
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 Error Check Code + Error Checking and Correction +
Error Correction Code
ECD Enhanced Color Display
ECHO European Commission Host Organization [Internet]
ECI External Call Interface
ECL Emitter Coupled Logic
ECM Electronic Control Module
ECMA European Computer Manufacturers Association
ECNE
ECP Enhanced/Extended
ECTL Electronic Communal Temporal Lobe
ECU EISA Configuration Utility
ED Erase Display
EDA Embedded Document Architecture [Go Corporation]
EDC Enhanced Data Correction +
Error Detection and Correction
EDDC Extended Distance Data Cable
EDGAR Electronic Data Gathering, Analysis and Retrieval
EDI Electronic Data Interchange +
Electronic Document Interchange [DEC]
EDIFACT EDI for Administration Commerce and Transport
EDL Edit Decision List
EDLC Ethernet Data Link Control
EDLIN Editor (Line Text)
EDM Electronic Document Management
EDOS Enhanced DOS for Windows
EDP Electronic Data Processing
EDPM Electronic Data Processing Machine
EDRAM Extended Dynamic Random Access Memory
EDS Electronic Data Systems (corporation)
EDSAC * Electronic Delay Storage Automatic Computer
EDSI Enhanced Small Device Interface
EDU Education (organization 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
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
EFL Emitter Follower Logic
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
EL Electroluminescent (display) + Erase Line
ELAN Emulated Local Area Network
ELC Embedded Linking and Control
ELF Extremely Low Frequency
ELS Entry Level System
EM Electronic Mail + Emphasized + End of Medium +
Expanded Memory
EMA Electronic Mail Association +
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
EMI Electromagnetic Interference
.EML Electronic Mail (file name extension)
EMM Expanded Memory Manager
EMR Electro-Magnetic Radiation +
Enhanced Metafile Record
Expanded Memory Specification [LIM]
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 +
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
EPL Effective Privilege Level
EPLD Electrically Programmable Logic Device
EPM Enhanced Editor for Presentation Manager [IBM] +
EPP Enhanced
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]
ERIC Educational
ERLL Enhanced Run Length Limited
EROM Erasable Read Only Memory
EROS Earth Resources Observation System [
ERR Error
ER/RC Extended Result/Response Code
ES Extra Segment
ESA
European Space Agency
ESC EISA System Component + Escape
ESCM Extended Services Communications Manager [IBM]
ESCON
ESC/P Epson Standard Code for Printers
ESD Electronic Software Distribution +
Electrostatic Discharge
ESDI Enhanced Small/System Device Interface
ESI Enhanced Serial Interface (specification) [Hayes]
ESMR Enhanced Specialized
ESN Electronic Security Number
ESP Emulation Sensing Processor +
Enhanced
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]
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]
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
EXP Exponent
EXT External
EXTRN External Reference
E-ZINE Electronic Magazine
