| Abbreviation | Definition |
|---|---|
| AOM | Airport Operations Manual |
| AOO | Aviation Ordnance Officer |
| AOP | Administrative And Operating Procedures |
| AOPA | Aircraft Owners and Pilots Association |
| AOPA | The Aircraft Owners and Pilots Association |
| AOS | Aircraft Operations Specifications |
| AOSC | Aircraft Operator Security Coordinator |
| AOSSP | Aircraft Operator Standard Security Program |
| AOU | Aviation Ordnanceman Utility |
| AOV | Aft Outflow Valve |
| AOWS | Aircraft Overhaul Work Stoppage |
| AP | AirPort |
| AP | Autopilot |
| APAC | Australia Pacific Airports Corporation |
| APAF | Aircraft Procurement Air Force |
| APAL | Australia Pacific Airports Launceston |
| APAS | Asia Pacific Aircraft Storage |
| APATS | Asia Pacific Aviation Training Symposium |
| APB | Aft Pressure Bulkhead |
| APB | APU (Auxiliary Power Unit) Breaker |