| p7r | PKCS #7 Certificate Request Response File |
| p7s | PKCS #7 Digital Signature |
| p7x | Windows SDK Packed Digital Signature |
| p7z | PKCS #7 Compressed Message |
| p8 | PICO-8 Data |
| p83 | GAEB DA 2000 Data File |
| p99 | MicroStation Modification Project Resource File |
| pa2 | CME SPAN Expanded Format Data |
| pa2m | SAM PA2M Alignment Data |
| pab | Microsoft Outlook Personal Address Book |
| pad | Act! Database Pointer |
| pad | Portable Application Description |
| padl | Cakewalk Pyro Audio Creator Disk Layout |
| pafsc | Esko LinkEdge Package |
| pai | PocketAI Data File |
| pair | NimbleGen Pair Report Data |
| pak | CrazyTalk SFX Data |
| pal | Adobe Pagemaker Palette Data |
| pal | Corel Painter Custom Palette |
| paltalk | Paltalk Data |
| pamp | Poweramp Album Thumbnail |
| pan | Chromeleon Control Panel |
| pan | Panorama Database File |
| panic | Mac OS X Kernel Panic Data |
| panorama | LabCognition Panorama Data |
| pao | Xilinx Peripheral Analyze Order File |
| pap | Corel Painter Paper Texture |
| paperlibrary | Corel Painter Paper Library |
| papers | Corel Painter Paper Texture |
| par | Mail.dat Postage Adjustment File |
| param | CASTEP Parameters Data |
| parca | RealityCharting Packaged Chart |
| part2 | NetObjects Fusion Internal System Data |
| part3 | NetObjects Fusion Internal System Data |
| part4 | NetObjects Fusion Internal System Data |
