| bud | Windows Binary Printer Description File |
| buk | DVD IFO Backup File |
| bul | I4 Bullseye Data |
| bunv | eZ-TOMAS Binary Universal File |
| buv | BrightAuthor User Variables Data |
| bv | Open Board Viewer Database |
| bval | DTI BVAL Data |
| bvec | DTI BVEC Data |
| bvf | VentaFax Phonebook |
| bvh | Biovision Hierarchy Data |
| bvs | SmartWare Standard View Backup |
| bvw | SmartWare Custom View Backup File |
| bvx | OptiTune Installation Package |
| bvxd | OptiTune Installation Manifest |
| bwc | BeadWizard Color Palette |
| bwm | Blaise Cati Menu Definition |
| bws | Website X5 Project Backup |
| bxi | Blaise Datamodel Properties |
| bxml | Bean XML Data |
| bxs | BioExplorer Session Data |
| bxw | Pedigree Central Database Index |
| bzx | SIR 4000 Quick3D Grid Assembly Data |
| c1 | POV-Ray Include File |
| c1w | Capture One Work Data |
| c2 | POV-Ray Include File |
| c2r | Windows Media Center Click-to-record File |
| c2s | G7 Click2Stitch Embroidery Design |
| c3d | Coordinate 3D Data |
| c3d | Chem3D Template File |
| c3e | Cype Data |
| c3t | Chem3D Template File |
| c3xml | Chem3D XML Format File |
| c4d | Maxon Cinema 4D Object |
| c4p | CrossOver v9 C4P Installer |
| c64 | PC64 Saved Session |
