| Abbreviation | Definition |
|---|---|
| PA1 | Worktable (PageAhead) |
| PAB | Personal Address Book |
| PAC | Atari STAD Image Bitmap graphics file |
| PAC | SBStudio II Package or song |
| PAD | Telemate KeyPAD definition file |
| PAGES | Apple Pages File |
| PAINT | Apple Macintosh Black & White MacPaint file Bitmap graphics |
| PAK | Compressed file archive (PAK) |
| PAL | Color palette |
| PAN | CorelDraw Printer-specific file |
| PAR | Parameter file ( Fractint) |
| PAR | Parts application (Digitalk PARTS) |
| PAR | Permanent output file |
| PAS | Pascal language source code file (Pascal - Delphi) |
| PAT | Bitmap graphics (1bit) (Patent data) (US Patent and Trademark Office) |
| PAT | Hatch patterns (AutoCAD - Photostyler) |
| PAT | Polygon Attribute Table (link geographic locations to databases) |
| PAT | Sound patch (Gravis Ultrasound) |
| PAT | Vector fill files (CorelDraw) |
| PB | Fax (FAXability Plus) |