| Abbreviation | Definition |
|---|---|
| PRR | Parts Replacement Request |
| PRS | Professional Referral Source |
| PRS | Prosthetic Research Specialist |
| PRS | Provisioning Requirements Statement |
| PRS | Primary Rescue Site |
| PRS | Primary Recovery Site |
| PRS | Precision Ranging System |
| PRS | Power Reactant System |
| PRS | Personnel Rescue System |
| PRS | Personnel Rescue Service |
| PRS | Payload Rotation Stand |
| PRS | Payload Retention Subsystem |
| PRSD | Power Reactant Supply and Distribution |
| PRSD | Power Reactant Storage and Distribution |
| PRSDS | Power Reactant Storage and Distribution System |
| PRSS | Problem Report Squawk Sheet |
| PRT | Progressive Regeneration Treatment |
| PRT | Peer Review Team |
| PRT | Pulse Repetition Time |
| PRTC | Punjab Roadways Transport Corporation |
| PRTC | Pepsu Road Transporat Corporation |
| PRTC | Priority Real Time Commands |
| PRTLS | Powered Return to Launch Site |
| PRV | Pressure Reduction Valve |
| PS | Post Script |
| PS | Personal (or Private Secretary) |
| PS | Program Stream |
| PS | Program Start |
| PS | Performance Spectrum |
| PS | Performance Space |
| PS | Planetary And Solar |
| PS | Prime Select |
| PS | Pressure Switch |
| PS | Power Supply |
| PS | Payload Support |
| PS | Payload Station |
| PS | Payload Specialist |
| PS | Parachute Subsystem |
| PS/2 | Peresonal System/2 |
| PS/FC | Power Supply/Fuel Cell |
| PS2 | Personal System 2 |
| PSA | Prostate- Specific Antigen - test used in screening for prostate cancer |
| PSA | Prosate Specific Antigen |
| PSA | Provisions Stowage Assembly |
| PSA | Pressure Switch Assembly |
| PSA | Preferred Storage Area |
| PSA | Pre/Post Sleep Activity |
| PSA | Power Servo Assembly |
| PSA | Power Servo Amplifier |
| PSA | Payload Support Avionics |