| bui | SOBEK Rainfall Series Data |
| buk | DVD IFO Backup File |
| bul | I4 Bullseye Data |
| bumptheme | BumpTop Theme Data |
| bunv | eZ-TOMAS Binary Universal File |
| buv | BrightAuthor User Variables Data |
| bv | Open Board Viewer Database |
| bv3 | Corel WordPerfect Overflow Data |
| bva | Biovision Motion Data |
| bval | DTI BVAL Data |
| bvec | DTI BVEC Data |
| bvel | Blender Fluid Simulation Velocity Data |
| bvf | VentaFax Phonebook |
| bvh | Biovision Hierarchy Data |
| bvl | Micrografx Picture Publisher 8 Texture |
| bvm | Battery Validation Manager Data |
| bvn | Hundegger CNC Machining Format Data |
| bvs | SmartWare Standard View Backup |
| bvt | VampirTrace Data |
| bvw | SmartWare Custom View Backup File |
| bvx | OptiTune Installation Package |
| bvxd | OptiTune Installation Manifest |
| bvy | Breevy Text Snippet |
| bwc | BeadWizard Color Palette |
| bweb | Bacula-Web Data |
| bwm | Blaise Cati Menu Definition |
| bwr | Kermit Beware Data |
| bws | Website X5 Project Backup |
| bwu | BlindWrite CD Copier Data |
| bwv | Business Wave Data |
| bxa | LogiBlox Signal Aliasing Information Data |
| bxd | Broken X Disk Manager Database |
| bxf | iPed Breeder eXchange Format Data |
| bxi | Blaise Datamodel Properties |
| bxml | Bean XML Data |