| AAB | Airport Advisory Board |
|---|---|
| AAS | Airport Advisory Service |
| AAS | Australian Alumni Singapore |
| AAS | Automobile Association of Singapore |
| ABS | Abu Simbel Airport, kód letiska IATA |
| ABS | Airport Base Station, WLAN riešenie od firmy Apple |
| ACR | Ambulance Call Report |
| ADP | Aeroports de Paris |
| ADS | tlačová agentúra Portugalska |
| AEC | atomic Energy Corporation (skr.) |