| Abbreviation | Definition |
|---|---|
| AOVC | Association of Old Vehicle Clubs |
| AOW | Apartment On Wheels |
| AP | AirPort |
| AP | Approved Permit |
| APAI | Air Port Authority of India |
| APAS | Airline Performance Analysis System |
| APATS | Asia Pacific Airline Training Symposium |
| APATS | Asian Pacific Airline Training Symposium |
| APAV | Autonomous Personal Air vehicle |
| APC | Air Project Coordinator |
| APC | Automatic Passenger Counter |
| APC | Automatic Performance Control |
| APCV | All Protected Carrier Vehicle |
| APECS | Advanced Proportional Engine Control System |
| APEX | Advanced Performance Experimental X |
| APF | Afloat Prepositioning Force |
| APFSP | Accident Prevention and Fight Safety Program |
| API | Advance Passenger Information |
| API | American Petroleum Institute |
| APIS | Advanced Passenger Information System |