| Abbreviation | Definition |
|---|---|
| PRS | Power Reactant System |
| PRS | Precision Ranging System |
| PRS | Primary Recovery Site |
| PRS | Primary Rescue Site |
| PRSD | Power Reactant Storage and Distribution |
| PRSD | Power Reactant Supply and Distribution |
| PRSDS | Power Reactant Storage and Distribution System |
| PRSS | Problem Report Squawk Sheet |
| PRT | Pulse Repetition Time |
| PRTC | Priority Real Time Commands |
| PRTLS | Powered Return to Launch Site |
| PRV | Pressure Reduction Valve |
| PS | Parachute Subsystem |
| PS | Payload Specialist |
| PS | Payload Station |
| PS | Payload Support |
| PS | Performance Space |
| PS | Planetary And Solar |
| PS | Pressure Switch |
| PS | Prime Select |