| ptd | Pro/ENGINEER Exported Table |
| ptdb | Peachtree Accounting Database |
| ptf | Pro Tools Session Data |
| ptf | Quanquest Project Translation Data |
| ptf | West LiveNote Portable Transcript Data |
| pth | LISREL Path Diagram Data |
| pth | 4D Path Document |
| pti | IBM e-Config Exported Portfolio Item |
| ptk | Quicken Online Financial Data |
| ptm | Microsoft MapPoint Map |
| ptmf | Huawei PTMF Trace Data |
| ptn | Abbyy FineReader User Pattern |
| ptn2 | PaperPort Thumbnail Cache |
| ptp | Primo Emulator Tape Image |
| ptped | iPed Database Backup |
| ptrack | SAM Predict Track Data |
| pts | Abbyy FineReader Data |
| pts | ENVI Ground Control Point File |
| ptt | Microsoft MapPoint Template |
| ptts | CASIA-OLHWDB 2.0 Page Data |
| ptu | Performer Terrain Utilities Data |
| ptu | PicoQuant Time Tagged File |
| ptx | Mari Ptex Data |
| ptxml | Windows PerfTrack XML Data |
| ptxt | Avid Pro Tools Session Template |
| pty | IBM Rational Rose Property Set |
| pub | OpenSSH Public Key Data |
| pubf | Adobe PageMaker 2 for Mac Data |
| pubkr | PGP Public Keyring Data |
| puc | Page Update Checker Data |