| prt | SmartWare Print Data |
| prt1 | Adobe Persuasion Slide |
| prtc | OmniPage PRTC Data |
| prtdot | SolidWorks Part Template |
| prtprp | SolidWorks Parts Properties Template |
| pru | IBM Tivoli Storage Manager Pruned Entry Data |
| prv | Microsoft Publisher Page Wizard Data |
| prv | Windows Previous Bootlog File |
| prvkr | PGP Private Keyring Data |
| prw | Artlantis Shader Preview |
| prwm | Packed Raw WebGL Model Data |
| prx | COREX Prosodic Annotation Data |
| prx | Lucene Positions File |
| prz | NI Multisim Packed Component Data |
| ps | ETCBC Phrase Structure Data |
| ps1 | ETCBC Phrase Structure Data |
| ps2 | ETCBC Word Parsing Data |
| ps2 | PCSX2 Memory Card Image |
| ps3 | ETCBC Phrase Structure Data |
| ps4 | ETCBC Phrase Structure Data |
| ps7 | Corel Paint Shop Pro Data |
| psa | Adobe Photoshop Album Catalog |
| psafe3 | Password Safe Database |
| psar | Sony PSP Firmware Archive |
| psb | Corel Paint Shop Pro Sunburst Preset |
| psbf | Polyspace Results Data |
| psbrush | Corel Paint Shop Pro Brush |
| psc | MODTRAN PSC Spectral Output File |
| psc | Scorelib PSC Data |
| psc | SmartWare Plotter Description Data |
