| APPC |
Advanced Program to Program Communication/Converter (IBM) |
| APPI |
Advanced Peer-to-Peer Internetworking |
| APPN |
Advanced Peer-to-Peer Network/Networking (IBM) |
| APR |
Access Point Roaming |
| APR |
Apache Portable Runtime (layer, library) |
| APRS |
Automatic Position Report System |
| APS |
Array Processing System |
| APS |
Auto Pilot System |
| APS |
Asynchronous Protocol Specification |
| APS |
Automatic Position Select |
| APS |
Assembly Programming System |
| APS |
Advanced Production/Photo System |
| APS |
Advanced Planning and Scheduling |
| APSE |
Ada Project Support Environment |
| APSL |
Apple Public Source License |
| APSN |
Atlantic Packet Satellite Network |
| APT |
Application Program Title |
| APT |
Adobe Postscript Point |
| APT |
Advanced Parallel Technology |
| APT |
Automatically Programmed Tools |
| APT |
Advanced Package Tool |
| APT |
Address Pass Through |
| APU |
Attached Processing Unit |
| AQL |
A Query Language |
| AQL |
Acceptable Quality Level |
| AR |
Aspect Ratio |
| AR |
Augmented Reality |
| AR |
Artificial/Augmented Reality |
| AR |
Access Router |
| ARA |
Apple/AppleTalk Remote Access |
| ARAP |
Apple Remote Access Protocol |
| ARB |
Architectural/Architecture Review Board |
| ARB |
Adaptive Rate Based |
| ARC |
Advanced RISC Computing |
| ARCA |
Advanced RISC Computing Architecture |
| ARCNET |
Attached Resource Computer/Computing Network |
| ARD |
Arbeitsgemeinschaft der öffentlich-rechtlichen Rundfunkanstalten der Bundesrepublik Deutschland |
| ARD |
Apple Remote Desktop |
| ARDF |
Amateur Radio Direction Finding |
| ARIN |
American Registry for Internet Numbers |
| ARIS |
Architecture of Integrated Information Systems |
| ARJ |
Admission Reject |
| ARL |
Adjusted Ring Length |
| ARL |
Authority Revocation List |
| ARLL |
Advanced Run Length Limited |
| ARM |
Acorn/Advanced RISC Machine |
| ARM |
ARPANET Reference Model |
| ARM |
Asynchronous Response Mode |
| ARM |
Account Resource Management |
| ARMA |
Association of Record Managers and Administrators, USA |