| Abbreviation | Definition |
|---|---|
| PRO | Graphics profile file (DOS) |
| PRO | Profile Configuration Data |
| PRO | Prolog language source code file |
| PROJ | Project File (Interface Builder) (NeXT) |
| PRP | Model properties (Rational Rose) |
| PRPROJ | Adobe Premiere Pro project file |
| PRR | Perfect Resume data file (Perfect Resume) |
| PRS | Presentation ( Harvard Graphics for Windows) |
| PRS | Printer Resource file |
| PRS | Procedure (dBASE IV) |
| PRT | P-CAD Component |
| PRT | Printer driver (Dr.Halo) |
| PRT | PTC Pro/ ENGINEER part |
| PRVKR | Private keyring (PGP) |
| PRX | FoxPro Compiled Program |
| PRZ | Freelance graphics file |
| PS | Adobe Postscript document (text/graphics) |
| PS2 | Adobe Level II Postscript document (text/graphics) |
| PSA | GNU PSA.OUT Pretty Simple Archive file |
| PSBO | Page Scope Box Operator |