| ptl | Corel Paint Shop Pro Tile Preset |
| ptm | Microsoft MapPoint Map |
| ptmf | Huawei PTMF Trace Data |
| ptn | Abbyy FineReader User Pattern |
| ptn | CADKEY Pattern Data |
| ptn | PaperPort Thumbnail Cache |
| ptn2 | PaperPort Thumbnail Cache |
| ptp | Act! Modem Sync Data |
| ptp | Primo Emulator Tape Image |
| ptp | ToolBook Instructor Assistant Book Data |
| ptped | iPed Database Backup |
| ptr | Redatam Pointer Data |
| ptrack | SAM Predict Track Data |
| pts | Abbyy FineReader Data |
| pts | ENVI Ground Control Point File |
| pts | RSView Machine Edition Project Settings Data |
| ptshortcut | PowerTunes Shortcut |
| ptt | Avid Pro Tools Session Template |
| ptt | Microsoft MapPoint Template |
| ptts | CASIA-OLHWDB 2.0 Page Data |
| ptu | Performer Terrain Utilities Data |
| ptu | PicoQuant Time Tagged File |
| ptu | SymPhoTime 64 Time Tagged Data |
| ptx | Corel Paint Shop Pro Texture Preset |
| ptx | Mari Ptex Data |
| ptx | PassMark Performance Test Baseline Data |
| ptx | Punch! Home Design Texture Data |
| ptxml | Windows PerfTrack XML Data |
| ptxt | Avid Pro Tools Session Template |
| pty | IBM Rational Rose Property Set |
