| 11. | .prj | IC layout architecture (MyCad) ◊ Project ◊ projections definition file (ArcView) |
| 12. | .prm | Parameters |
| 13. | .prn | Bitmap graphics (Calcomp Raster File) (black and white or 4bit CMYK) ◊ Print Table (space delimited text) ◊ Printer driver (Signature) ◊ Printer output file (most common) ◊… 0.3 KB |
| 14. | .pro | Graphics file (Pagis Pro 3.0) ◊ Graphics profile file (DOS) ◊ Profile (configuration data) ◊ Profile file (Euphoria, Terramodel) ◊ Prolog language source code file |
| 15. | .proj | Project File (Interface Builder) (NeXT) |
| 16. | .prp | Data conversion saved project file (Oberon Prospero) ◊ Model properties (Rational Rose) |
| 17. | .prr | The Perfect Resume data file (Perfect Resume) |
| 18. | .prs | Presentation (Harvard Graphics Win) ◊ Printer Resource eg. fonts (WordPerfect) ◊ Procedure (dBASE IV) |
| 19. | .prt | A print-formatted file ◊ Component (P-CAD) ◊ Part file (PTC Pro/Engineer, CADkey, SolidWorks) ◊ Printer driver (Dr.Halo) |
| 20. | .prv | Internet provider template file (psiMail) |
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