| Abbreviation | Definition |
|---|---|
| AS | Application Server |
| ASA | Active Server Application |
| ASA | Adaptive Server Anywhere |
| ASA | Application Service Assurance |
| ASA | Automatic System Answer |
| ASAG | ASEAN South American German |
| ASAM | Application Specific Administration Module |
| ASAP | Asynchronous Service Access Protocol |
| ASC | Applications Strategy Council (Internet2) |
| ASCEND | Asian Social Culture Empowerment Networking Development |
| ASCI | Agent to Server Communications Interval |
| ASCWG | Actuated Signal Control Working Group |
| ASD | Address Self Discovery |
| ASE | Adaptive Server Enterprise |
| ASE | Application Services Environment |
| ASF | Active Server File |
| ASG | Auto Scale Group |
| ASH | Active Session History |
| ASI | Advanced Server Interface |
| ASI | Asynchronous Serial Interface |