| Abbreviation | Definition |
|---|---|
| PIMA | Photographic and Imaging Manufacturers Association |
| PIO | Programmed Input/Output |
| PM | Power Management |
| PME | Power Management Event |
| PMP | Protected Media Path |
| PnP-X | Plug aNnd Play eXtension |
| POS | Point Of Sale |
| PPM | Parent Partition Mapping |
| PRCB | PRocessor Control Block |
| PRCS | Proactive Reporting and Correcting Safeguard |
| PS/2 | Peresonal System/2 |
| PSHED | Platform-Specific Hardware Error Driver |
| PSK | Product Service Key |
| PSS | Product Support Services |
| PTEC | Page Table Edit Control |
| PTS | Page Table Shadowing |
| PU | Partition Unit |
| PUMA | Protected User-Mode Audio |
| PVP | Protected Video Path |
| PXE | Pre-boot eXecution Environment |