| Abbreviation | Definition |
|---|---|
| BMK | Bookmark file (Windows) |
| BMP | Bit Map Picture |
| BMP | Bitmap graphics (PC Paintbrush - many) |
| BMT | Ami Pro Button (Ami Pro) |
| BNK | Adlib instrument bank file |
| BNR | Graphics Banner (Banner - Poster) |
| BOB | BOB Image file Bitmap graphics |
| BOO | BOO Encoded file archive (ASCII) |
| BOO | Book (IBM BookManager) |
| BOO | Bootstrap (Kermit protocol binary file) |
| BOOK | Book (Adobe FrameMaker) |
| BOZ | BZIP over ZIP Compressed file archive |
| BPC | Chart (Business Plan Toolkit) |
| BPP | Clarion Backup application file |
| BPS | MicroSoft Works Text document backup file |
| BPS | Text document backup (MS Works) |
| BPT | Bitmap master file (CorelDraw) |
| BR | BRidge software Script file |
| BR | Omnis7 Data file |
| BRD | Allegro file |