| 1. | .b | BASIC language source code file ◊ Base program (Modula-3) ◊ Batch list (APPLAUSE) ◊ Blue channel image data (Spaceward Graphics) |
| 2. | .b&w | Bitmap graphics (Mono binary screen image) (1st Reader) ◊ Bitmap graphics (black and white) (atari - Macintosh) |
| 3. | .b00 | Graphics |
| 4. | .b1n | Bitmap graphics (both mono and color binary screen image) (1st Reader) |
| 5. | .b30 | Printer font (JLaser - Cordata) (Ventura Publisher) |
| 6. | .b4 | Nuts and Bolts file (Helix) |
| 7. | .b64 | Encoded file archive (ascii) (base64 MIME) |
| 8. | .b8 | Bitmap graphics (one byte per pixel) plane two (PicLab) ◊ Blue channel image data (24bit RGB Cubicomp PictureMaker 3D animation) |
| 9. | .bac | Backup |
| 10. | .bad | Bad file (Oracle) |
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