| Abbreviation | Definition |
|---|---|
| OXID | Oxidizer |
| OXY | OXYgen |
| OZ | Ozone |
| P | Momentum |
| P | Pallet (Spacelab) |
| P | Panel |
| P | Period |
| P | Phenomena |
| P | Pilot |
| P | Pitch |
| P | Pole |
| P | Pressure |
| P | Prime |
| P | Roll Rate (Angular Rate) |
| P&FS | Particles and Fields Subsatellite |
| P&I | Performance and Interface (Specification) |
| P&M | Performance Monitor |
| P&M | Phase Modulation (Modulated) |
| P&M | Planetary Mission |
| P&M | Preventive Maintenance |