| Abbreviation | Definition |
|---|---|
| PROC | Puerto Rican Operations Center |
| PROFIS | Professional Filler System |
| PROFIS | Professional Officer Filler Information System |
| PROFIS | Professional Officer Filler System |
| PROFS | Professional Office System |
| PROG | Progress |
| PROM | Programmable Read-Only Memory |
| PROP | Propeller |
| PROPIN | Caution - Proprietary Information Involved |
| PROS | Propulsion Subsystem |
| PROSPECT | Proponent-Sponsored Engineer Corps Training |
| PROTO | Prototype |
| PROUD | Peace Reigns Only Under Defense |
| PROVORG | Providing Organization |
| PROVORG | Providing Organization Proword Procedure Word |
| PRP | Personnel Reliability Program |
| PRP | Post Reinforcement Pause |
| PRP | Production Readiness Plan |
| PRP | Pulse Repetition Period |
| PRQ | Personal Radio, Any use |