| 11. | .pcf | Profiler Command File (Microsoft Source Profiler) |
| 12. | .pch | Patch file ◊ Precompiled header (Microsoft C/C++) |
| 13. | .pci | PCI Miniport file (Microsoft Windows System file) |
| 14. | .pcj | Multimedia authoring tool graphics (IBM's Linkaway-Live) |
| 15. | .pck | Pickfile (Turbo Pascal) |
| 16. | .pcl | HP-PCL graphics data (HP Printer Control Language) |
| 17. | .pcm | Audio file (OKI MSM6376 Sythesizer Chip) |
| 18. | .pcp | Bitmap graphics (PCP file) ◊ Live Update Pro file (Symantec) |
| 19. | .pcs | Animation (Apple Macintosh PICT files) ◊ Picture storage file (Microsoft Powerpoint - Microsoft ClipArt Gallery) |
| 20. | .pct | Bitmap graphics (Macintosh b w PICT1 - color PICT2) |
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