| Abbreviation | Definition |
|---|---|
| PIO | Payload Integration Plan |
| PIO | Pilot-Induced Oscillation |
| PIP | Payload Integration Plan |
| PIP | Payload Interface Plan |
| PIP | Plant Instrumentation Program |
| PIP | Production Instrumentation Package |
| PIPA | Pulse Integrating Pendulum Accelerometers |
| PIPA | Pulse Integrating Pendulum Assembly |
| PIQ | Pre- Inspection Questionnaire |
| PIRN | Preliminary Interface Revision Notice |
| PIT | Pre-Installation Test |
| PITG | Payload Integration Task Group |
| PITS | Payload Integration Test Set |
| PIU | Power Interface Unit |
| PIU | Pyrotechnic Initiator Unit |
| PIV | Peak Inverse Voltage |
| PJD | Precision Jet Drive |
| PK | PeaK |
| PK/PK | Peak-to-Peak |
| PKD | Programmable Keyboard and Display |