| Abbreviation | Definition |
|---|---|
| PB | Phonebook (WinFax Pro) |
| PB | PixBase Setup file |
| PB | Proboard configuration files |
| PB1 | Document (First Publisher for Windows) |
| PBA | Powerbasic BASIC language source code file (Genus) |
| PBD | FaxNOW! Phone Book Data file |
| PBI | Genus PowerBasic Include file |
| PBI | Profiler Binary Input (MS Source Profiler) |
| PBK | Phonebook |
| PBL | Powerbasic library (Genus) |
| PBM | Poskanzer's Portable Bit Map format file |
| PBM | XLib Planar BitMap graphics file |
| PBO | Profiler Binary Output (MS Source Profiler) |
| PBT | Profiler Binary Table (MS Source Profiler) |
| PC | IBM PC-specific information Text file |
| PC1 | Atari Degas Image Bitmap graphics |
| PC2 | Atari Degas Image Bitmap graphics |
| PC3 | Atari Degas Image Bitmap graphics |
| PC3 | Harvard Graphics 3.0 Custom PALette |
| PC8 | NewWave Write ASCII text IBM8 character set file |