| Abbreviation | Definition |
|---|---|
| PO | Pilot Officer (Royal Air Force) |
| PO | Planning Order |
| PO | Program Objective |
| PO | Provocative Operation |
| PO | Pull Out |
| PO | Purchase Order |
| PO1 | Petty Officer First Class |
| PO2 | Petty Officer Second Class |
| PO3 | Petty Officer Third Class |
| POA | Point Of Attack |
| POA | Prisoner Of Azkaban |
| POADS | Psychological Operations Automated Data System |
| POAI | Primary Other Aircraft Inventory |
| POAS | Psychological Operations Automated System |
| POAT | Psychological Operations Assessment Team |
| POB | Persons On Board |
| POB | Psychological Operations Battalion |
| POC | Point Of Capture |
| POC | Point Of Contact |
| POC | Preliminary Operational Concept |