| AA |
Auto Answer |
| AAB |
All-to-All Broadcast |
| AAL |
Asynchronous Transfer Mode Adaptation Layer |
| AAP |
Applications Access Point |
| AAS |
All-to-All Scatter |
| AASP |
ASCII Asynchronous Support Package |
| AAT |
Average Access Time |
| ABI |
Application Binary Interface |
| ABIOS |
Advanced BIOS |
| ABIST |
Automatic Built-In Self-Test |
| ABLE |
Adaptive Battery Life Extender |
| ABR |
Available Bit Rate |
| ABRS |
Automated Book Request System |
| ABS |
Absolute |
| ABT |
Abort |
| ABTS |
ASCII Block Terminal Services |
| ACC |
Accumulator |
| ACD |
Automated Call Distribution |
| ACDI |
Asynchronous Communications Device Interface |
| ACE |
Advanced Computing Environment |
| ACF |
Access Control Field or 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 |
| ACMS |
Application Control Management System |
| ACP |
Ancillary Control Program or Auxiliary Control Process |
| ACS |
Access or Access Control Set or Access Control System |
| ACTS |
Automated Computer Time Service |
| ACTT |
Advanced Communication and Timekeeping |
| ADCCP |
Advanced Data Communication Control Procedures |
| ADD |
Automatic Document Detection |
| ADF |
Automatic Document Feeder or Automatically Defined Function |
| ADI |
AutoCAD Device Interface |
| ADL |
Address Data Latch |
| ADLAT |
Adaptive Lattice Filter |
| ADLC |
Adaptive Lossless Data Compression |
| ADMACS |
Apple Document Management and Control System |
| ADMD |
Administrative Management Domain |
| ADP |
Automatic Data Processing |
| ADPCM |
Adaptive Differential Pulse Code Modulation |
| ADR |
Address |
| ADS |
Application Development Solutions |
| ADSC |
Address Status Changed |
| 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 |
| AF |
Auxiliary carry Flag |
| AFA |
Accelerated File Access |
| AFC |
Automatic Font Change |
| AFD |
Automatic File Distribution |
| AFII |
Association for Font Information Interchange |
| AFIRM |
Automated Fingerprint Image Reporting and Match |
| AFIS |
Automated Fingerprint Identification System |
| AFS |
Andrew File System |
| AFTP |
Anonymous File Transfer Protocol |
| AGC |
Automatic Gain Control |
| AI |
Analog Input or Artificial Intelligence |
| AIA |
Applications Integration Architecture |
| AIF |
Audio Interchange Format |
| AIIM |
Association for Information and Image Management |
| AIN |
Advanced Intelligent Network |
| AISB |
Association of Imaging Service Bureaus |
| AISP |
Association of Information Systems Professionals |
| AIX |
Advanced Interactive Executive |
| ALC |
Arithmetic and Logic Circuits or Automatic Level Control |
| ALE |
Address Latch Enable |
| ALE |
Address Latch Enable |
| ALGOL |
Algorithmic Oriented Language |
| ALIBI |
Adaptive Location of Internet worked Bases |
| ALINK |
Active Link |
| ALIWEB |
Archie like Indexing in the Web |
| ALN |
Asynchronous Learning Network |
| ALR |
Advanced Logic Research, Inc. |
| ALT |
Alternate |
| ALT. |
Alternate lifestyle |
| ALU |
Arithmetic Logic Unit |
| AMANDDA |
Automated Messaging and Directory Assistance |
| AMD |
Active Matrix Display or Advanced Micro Devices |
| AMMA |
Advanced Memory Management Architecture |
| AMPS |
Advanced Mobile Phone Service |
| ANCOVA |
Analysis of Covariance |
| ANI |
Automatic Number Identification |
| .ANI |
Animated Cursor |
| ANN |
Artificial Neural Network |
| .ANN |
Annotations |
| ANOVA |
Analysis Of Variance |
| ANSI |
American National Standards Institute |
| AO |
Analog Output |
| AOCE |
Apple Open Collaboration Environment |
| AOE |
Application Operating Environment |
| AOL |
America Online |
| AOS |
Add or Subtract |
| AP |
Adjunct Processor or Application Processor |
| A/P |
Accounts Payable |
| APA |
Adaptive Packet Assembly or All Points Addressable |
| APAR |
Authorized Program Analysis Report |
| APAREN |
Address Parity Enable |
| APCUG |
Association of PC User Groups |
| API |
Application Program Interface |
| APIC |
Advanced Programmable Interrupt Controller |
| APIS |
Advanced Passenger Information System |
| APL |
A Programming Language |
| APM |
Advanced Power Management |
| APP |
Application |
| APPC |
Advanced Program-to-Program Communications |
| APPI |
Advanced Peer-to-Peer Internetworking |
| APPN |
Advanced Peer-to-Peer Networking |
| APPS |
Applications |
| APRP |
Adaptive Pattern Recognition Processing |
| APS |
Advanced Photo System or Asynchronous Protocol Specification |
| APSE |
ADA Programming Support Environment |
| APT |
Address Pass Through or Automatically Programmed Tools |
| A/R |
Accounts Receivable |
| ARA |
AppleTalk Remote Access |
| ARAG |
Antireflective-Antiglare |
| ARCNET |
Attached Resource Computer Network |
| .ARJ |
Compressed File |
| ARL |
Adjusted Ring Length |
| ARLL |
Advanced Run Length Limited |
| ARM |
Advanced RISC Machine or Annotated Reference Manual |
| ARMA |
Association of Records Managers and Administrators |
| ARP |
Address Resolution Protocol |
| ARPANET |
Advanced Research Projects Agency Network |
| ARPL |
Adjust Requested Privilege Level |
| ARTA |
Apple Real Time Architecture |
| ARTIC |
A Real-Time Interface Compressor |
| ARTS |
Asynchronous Remote Takeover Server |
| ARTT |
Asynchronous Remote Takeover Terminal |
| ARQ |
Automatic Repeat Request |
| ARU |
Audio Response Unit |
| AS |
Autonomous System |
| ASAP |
As Soon As Possible or Automatic Switching and Processing |
| ASCII |
American Standard Code for Information Interchange |
| ASIC |
Application-Specific Integrated Circuit |
| ASIT |
Advanced Security and Identification Technology |
| ASL |
Adaptive Speed Leveling |
| ASLM |
Apple Shared Library Manager |
| .ASM |
Assembler Source Language |
| ASMP |
Asymmetric Multiprocessing |
| ASN |
Abstract Syntax Notation or Autonomous System Number |
| ASP |
Association of Shareware Professionals |
| ASPI |
Advanced SCSI Programming Interface |
| ASPS |
Advanced Signal Processing System |
| ASR |
Address Space Register or Automatic Send-Receive |
| ASYNC |
Asynchronous |
| AT |
Advanced Technology or 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 |
| ATM |
Adobe Typeface Manager or Asynchronous Transfer Mode |
| ATPS |
AppleTalk Printing Services |
| ATR |
Automatic Terminal Recognition |
| ATS |
Administrative Terminal System or Apple Terminal Services |
| AT&T |
American Telephone and Telegraph |
| ATTN |
Attention |
| ATTRIB |
Attribute |
| AUDIT |
Automated Data Input Terminal |
| AUI |
Attachment Unit Interface |
| AUP |
Acceptable Use Policy |
| AUTO |
Automatic |
| AUTOEXEC |
Automatic Execution |
| AUX |
Auxiliary |
| AV |
Audio/Video or Audiovisual |
| AVA |
Audio Visual Authoring |
| AVC |
Audio Visual Connection |
| AVG |
Average |
| AVI |
Audio Visual Interleave |
| AVR |
Automatic Voice Recognition |
| AWG |
American Wire Gage |
| AWS |
Advanced Workstations and Systems |
| AX |
Architecture Extended or Automatic Transmission |
