| 41. | .pc3 | Bitmap graphics (Atari Degas Image) ◊ Custom palette (Harvard Graphics 3.0) |
| 42. | .pc8 | Ascii text IBM8 character set (NewWave Write) |
| 43. | .pcb | P-CAD database (P-CAD) ◊ Printed Circuit Board (PADS) ◊ Printed Circuit Board file (ACCEL, Protel) ◊ Project (PrintShop) ◊ Settings (Microsoft PowerPoint) |
| 44. | .pcc | Cutout picture vector graphics (ZSoft PC Paintbrush) |
| 45. | .pcd | Bitmap graphics - Kodak Photo-CD format (multi-resolution) ◊ P-Code compiled test scripts (Microsoft Visual Test) |
| 46. | .pcds | Bitmap graphics - Kodak Photo-CD format (multi-resolution) |
| 47. | .pce | Mapping mailbox names to DOS filenames (Eudora) |
| 48. | .pcf | Profiler Command File (Microsoft Source Profiler) |
| 49. | .pch | Patch file ◊ Precompiled header (Microsoft C/C++) |
| 50. | .pci | PCI Miniport file (Microsoft Windows System file) |
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