Computer Directory from A to A

2DD              double-side double density
2HD              double-side high density
3D DDI          3 Dimensional Device Driver Interface
4GL               4th generation language
4GT               4 GB Ram Tuning

AA        Auto Answer

AAB       All-to-All Broadcast

AAL       Asynchronous Transfer Mode Adaption Layer

AAP       Applications Access Point [DEC]

AAS       All-to-All Scatter

AASP      ASCII Asynchronous Support Package

AAT       Average Access Time

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       Absolute

ABT       Abort

ABTS      ASCII Block Terminal Services

AC        Autocheck + Automatic Computer + Alternating Current

ACC       Accumulator

ACD       Automated Call Distribution +

          Automatic Call Distributor

ACDI      Asynchronous Communications Device Interface

ACE       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 +

          Auxillary Control Process

ACROSS    Automated Cargo Release and Operations

          Service System

ACS       Access + Access Control Set +

          Access Control System +

          Asynchronous Communication Server

ACTS      Automated Computer Time Service

ACTT      Advanced Communication and Timekeeping

          Technology [Seiko]

ACU       Automatic Calling Unit

A/D       Analog to Digital

ADA       Automatic Data Acquisitions + Programming

          Language named after Augusta Ada Lovelace)

ADB       Apple Desktop 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 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 1-2-3] [LDC]

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 [Bell Atlantic]

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       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

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      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 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, Safi Qureshey, Thomas Yuen)

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 + (First Serial Port)

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

Computer Directory from B to B

BAR              base address register

BASIC           beginner's all-purpose symbolic instruction code

BBS              bulletin board system

bcc               blind carbon copy

BCL              bias compensation layer

BDA              BIOS Data Area

BDC              backup domain controller

BDK              Business Development Kit

BIOS             basic input/output system

BIPS             billion instructions per second

BIS               boot integrity services

BLOB            Binary Large Object

BML              Broadcast Markup Language

BMP             Basic Multilingual Plane

BMP             Bit Map

BMS             broadcast message server

BNF              Backup Naur Form

BOF              beginning of file

BOOTP         bootstrap protocol

BPB              BIOS Parameter Blocks

BPC              Broadcast PC

BPI               bit per inch

BPI               bit per instruction

bpp               bits per pixel

BPR              business process reengineering

bps               bit per second

BRAN            Broadband Radio Access Networks

BRI               Basic Rate Interface

BSDL            Boundary Scan Description Language

BTL               backplane transceiver logic

BTRON          Business TRON

BUS              broadcast unknown server

Computer Directory from C to D

C&C              computer and communication

CA                conditional access

CA                certification authority

CAD              computer aided design

CAD/CAM      computer aided design / computer aided manufacturing

CAE              computer aided engineering

CAE              common application environment

CAE              Conditional Access Engine

CAI               computer assisted (aided) instruction

CAL              common application language

CAL              computer assisted learning

CALS            Computer-aided Acquisition and Logistical Support

CAM             computer aided manufacturing

CAM             content addressable memory

CAPI             Cryptographic API

CASE            computer aided software engineering

CAT              computer aided testing

CBQ              class-based queuing

CDA              Compound Document Architecture

CDB              Command Description Block

CDC              Connected Device Configuration

CDDI             copper distributed data interface

CDE              Common Desktop Environment

CDF              Channel Definition Format

CDFF            Common Document File Format

CDIF             Common Document Intermediate Format

CDL              Class Definition Language

CDP              Concept Description Plan

CDRA            Character Data Representation Architecture

CDSA            Common Data Security Architecture

CEDR            Windows CE Driver Repository

CG                computer graphics

CGA              Color Graphics Array

CGA              column grid array

CGI               Computer Graphics Interface

CGI               common gateway interface

CGM             Computer Graphics Metafile

CHRP            Common Hardware Reference Platform

CHS              cylinder head sector

CI                  Component Instrumentation

CICS             Customer Information Control System

CID               Compatible ID

CIFS             Common Internet File System

CIM               computer integrated manufacturing

CIM               Common Information Model

CIMOM          CIM Object Model

CINF             check (modem) INF tool

CIS               card information structure

CIS               customer information system

CISC             complex instruction set computer

CL                 CAS(column address strobe) Latency

CLAD            cell assembler/disassembler

CLDC            Connected Limited Device Configuration

CLI                Call Level Interface

CLOS            Common Lisp Object System

CLP              cell loss priority

CLUT             Colour Look-Up Table

CMC             Computer Numeric Control

CMIP             common management information protocol

CML              Caucus Markup Language

CMM             color matching modules

CMM             Capability Maturity Model

CNR              Communication and Networking Riser

COBOL         common business oriented language

COCOMO      construction cost model

COM             Component Object Model

CORBA         Common Object Request Broker Architecture

COSE           Common Open Software Environment

COSS           Common Object Service Specification

CP/M            control program for a microcomputer

CPN              central processing node

CPU              central processing unit

CRL              Certificate Revocation List

CSEL            Cable SELect

CSMA/CA      carrier sense multiple access with collision avoidance

CSMA/CD      carrier sense multiple access with collision detection

CSN              Card Select Number

CSS              Contact Start Stop

CSV              comma separated value format

CT                 computerized tomography

CTI                Computer Telephony Integration

CTRON          central-TRON

CTS              computerized typesetting system

CTS              Clear To Send

DA                data administrator

DAA              Data Access Arrangement

DAC              Design Automation Conference

DAP              Directory Access Protocol

DAS              dual attachment station

DASD            direct access storage device

DB                database

DB2              Database 2

DBA              database administrator

DBC              Device Bay Controller

DBM             Dual Bit Map

DBMS           database management system

DC                device context

DCD              Data Carrier Detect

DCE              Data Communications Equipment

DCE              distributed computing environment

DCF              Distributed Coordination Function

DCI               display control interface

DCL              Delay Calculation Language

DCLZ             data compression Lempel-Ziv

DCOM           Distributed Component Object Model

DDC2B          Display Data Channel Standard, Level 2B

DDE              Dynamic Data Exchange

DDF              Data Description Field

DDFF            Distributed Disk File Facility

DDK              Driver Developers Kit

DDL              data definition language

DDM             design data manager

DDM             Distributed Data Management

DDML            Display Driver Management Layer

DDoS            distributed denial of service

DDS              Digital Data Storage

DDS              Distributed Data Server

DEF              Design Exchange Format

DES              data encryption standard

DFM              Distributed File Management

DFS              Distributed File System

DFT               Drive Fitness Test

DFT               design for test

DIB               Device Independent Bitmap

DIB               Directory Information Base

DIFS             distributed access inter frame space

DIM               Device Interface Module

DINA             Distributed Information Processing Network Architecture

DIPS             Dendenkousha Information Processing System

DISA             Distributed Information Processing System Architecture

DISM             Digital Interface Standards for Monitor

DISP             Directory Information Shadowing Protocol

DIT                Directory Information Tree

DLC              data link control

DLCI              datalink channel identifier

DLL               dynamic link library

DME             Distributed Management Environment

DMI               Desktop Management Interface

DML              data manipulation language

DMTF            Desktop Management Task Force

DMWG          Data Management Work Group

DN                Distinguished Name

DNS              Domain Name System

DOA              data oriented approach

DOM             Distributed Operations Master

DOMF           Distributed Object Management Facility

DOP              Directory Operational Protocol

DOS              Disk Operating System

DP                data parallelism

DPC              Deferred Procedure Call

DPI               dot per inch(dpi)

DPMI             DOS protected mode interface

DPMS           Display Power Management Signaling

DRC              design rule checker

DRDA            Distributed Relational Database Architecture

DRF              Data Recovery Field

DRM             Digital Rights Management (System)

DR-PI            design representation programming interface

DS                Directory Service

DSA              Digital Signature Algorithm

DSE              Development Software Engineer

DSM             digital storage media

DSM-CC        digital storage media-control command

DSO              Dynamic Shared Object

DSS              Microsoft Mail Directory Synchronization (dir-sync) Server

DSS              decision support system

DSSSL          Document Style Semantics and Specification Language (ISO/IEC 10179)

DSU              digital service unit

DTC              Distributed Transaction Coordinator

DTD              document type definition

DTE              data terminal equipment

DTM              data transfer mechanism

DTP              desktop publishing

DTR              Data Terminal Ready

DVMCI          digital video media control interface

DVO              Digital Video Output

DXF               drawing interchange file