| Abbreviation | Definition |
|---|---|
| PEMU | Panel-mount Environmental Monitoring Unit |
| PET | Personal Electronic Translator |
| PET | Personal Exploration Terminal |
| PEU | Port Expansion Unit |
| PFC | Power Factor Correction |
| PFU | Paper Feed Unit |
| PGA | Pin Grid Array |
| PGU | Propagate Generate Unit |
| PHC | Personal Home Computer |
| PHD | Permanent Head Damage |
| PHD | Portable Hard Drive |
| PHD | Push Here, Dummy |
| PHIB | PCI (Peripheral Component Interface)/ Hub Interface Bridge |
| PI | Packet Interface |
| PI | Parity Inner |
| PI | Platform Independent |
| PI | Processor Interface |
| PIA | Peripheral Interface Adapter |
| PIA | Primary Interop Assembly |
| PIB | Processor In a Box |