| Abbreviation | Definition |
|---|---|
| APO | Acting Pilot Officer |
| APO | Afloat Pre-positioning Operation |
| APO | Army Post Office |
| APO | ASAS (All-Source Analysis System) Project Office |
| APO | Authorized Personnel Only |
| APOBS | Anti-Personnel Obstacle Breaching System |
| APOD | Aerial Port of Debarkation |
| APOD | Air Port of Disembarkation |
| APOD | Airport of Debarkation |
| APOE | Aerial Port of Embarkation |
| APOE | Airport of Embarkation |
| APOE | Airports Of Entry |
| APOE | Army Post Office Europe |
| APORS | Army Performance Oriented Review System (or, and Standards) |
| APORT | Aerial PORT |
| APORTS | Aerial POrtable Remote Telecommunications System |
| APORTS | Aerial PORTS |
| APORTSREP | Aerial PORTS and Air Operating Bases REPort |
| APOSS | Army Publications Ordering and Subscription System |
| APP | Advanced Procurement Plan |