| Abbreviation | Definition |
|---|---|
| PDU | Pilot Display Unit |
| PDU | Power Drive Unit |
| PDU | Pressure Distribution Unit |
| PDU | Pulse Detection Unit |
| PDV | Pressure Disconnect Valve |
| PE | Perkin Elmer |
| PE | Physical Extent |
| PE | Project Engineer |
| PEAP | Personal Egress Air Pack |
| PEAP | Personal Egress Air Packs |
| PEB | Performance Evaluation Board |
| PED | Payload Element Developer |
| PED | PEDal |
| PED | PEDestal |
| PED | Platform Equipment Deck |
| PEFO | Payload Effects Follow-on Study |
| PEG | Powered Explicit Guidance |
| PEHG | Payload Ethernet Hub Gateway |
| PEI | Primary Engine Instrumentation |
| PEIR | Project Equipment Inspection Record |