| p7c | PKCS #7 Certificate Data |
| p7d | PKCS #7 Detached Signature |
| p7e | File Encryptor Encrypted Data |
| p7f | digiSeal Reader P7F Data |
| p7m | PKCS #7 Encrypted Message |
| p7mkey | KeePass Certificate-protected Key |
| 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 |
| p96 | Win96 Database |
| p97 | Win97 Database |
| 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 |
| pag | Eze EMS Page Data |
| pag | Psion Organiser Pager Data |
| 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 |
