| Abbreviation | Definition |
|---|---|
| PPM | Parts Per Minute |
| PPM | Pulses Per Minute |
| PPMD | Program/Project Management Development |
| PPO | Payload Projects Office |
| PPO2 | Oxygen partial pressure |
| PPO2 | Partial Pressure Oxygen |
| PPP | Payload Patch Panel |
| PPP | Peak Pulse Power |
| PPP | Programmable Power Processor |
| PPR | Payload Preparation Room |
| PPS | Pneumatic Power Subsystem |
| PPS | Printer/Plotter System |
| PPS | Provisioning Performance Schedule |
| PPS | Pulse Per Second |
| PQGS | Propellant Quantity Gaging System |
| PQI | Preliminary Quality Inspection |
| PQI | Propellant Quantity Indicator |
| PR | Payload Recorder |
| PR | Performance Report |
| PR | Position Record |