| AAE | automatic answering equipment (skr.) |
|---|---|
| AAS | Automobile Association of Singapore |
| ABA | Australian Broadcasting Authority |
| ABM | Automatic Building Machine |
| ABS | Automated Billing System |
| ADP | Automatic Document Processing |
| AES | Automatic Emulation Switching |
| APOFÓNIA | ablaut, stupňovanie samohlások (lingv.) |
| ATA | Automatic Tracking Aid |
| ATC | Autodesk Authorised Training Centre (skr.) |