| Abbreviation | Definition |
|---|---|
| ANSA | Advanced Networking and Server Administration |
| ANTS | Active Node Transfer System |
| ANTS | Advanced Net Testing System |
| ANTS | Auto-Configuration Networking Technology Standardization |
| AO/DI | Always On / Dynamic ISDN |
| AOD | Assert Or Die |
| AODV | Ad-Hoc on Demand Distance Vector |
| AOL | Alert On Lan |
| AOL | All Others Left |
| AOL | Awake On Lan |
| AON | Activity On Node |
| AOPC | Armored Optical Patch Cord |
| AOT | Atomicity Of Transmission |
| AP | Advanced Packaging |
| APA | Adaptive Packet Assembly |
| APC | American Power Conversion (Corporation) |
| APC | Automatic Ping Control |
| APIMS | AP Intelligent Mail Switch |
| APIPA | Automatic Private Internet Protocol Address |
| APN | Access Point Number |