| Abbreviation | Definition |
|---|---|
| PIP | Plug In Panel |
| PIP | Presence Information Panel |
| PIPT | Physically Indexed Physically Tagged |
| PIR | Processor Information ROM (Read-Only Memory) |
| PISA | Portable Instruction Set Architecture |
| PISO | Parallel In, Serial Out |
| PIT | Point In Time copies |
| PIT | Programmable Interval Timer |
| PIV | Pentium IV Microprocessor |
| PIX | Private Internet eXchange |
| PJB | Personal Juke Box |
| PKB | Portable KeyBoard |
| PL | Pattern Loss |
| PL | Port Link |
| PL | Power Level |
| PLAC | Programmable Logic Array Chip / Controller |
| PLC | Programmable Linear Controller |
| PLCC | Plastic Leaded Chip Carrier |
| PLDM | Platform Level Data Model |
| PLIM | Physical Layer Interface Module |