| bap | Blaze Audio Wave Information |
| bap | Visage Mpeg-4 ASCII Body Animation Parameters File |
| baroc | IBM Tivoli Enterprise Console Adapter Description |
| bartco | Bartco VMS Message Data |
| bas | MODFLOW Basic Package |
| base | BioArray Software Environment Data |
| base64 | Base64 Encoded Data |
| bash_history | Bash History Data |
| bav | The Bat! Anti-Virus Plugin |
| baw | BrainLED AlfaWave Session |
| bbd | Xilinx Black Box Definition |
| bbi | LinkOne Publisher Book Data |
| bbk | Sage Fixed Assets Database Backup |
| bbk | Treepad Database Blob Backup |
| bblx | E-Sword Bible Data |
| bbma | BonziBuddy Data |
| bbq | BitBeamer Transfer Queue Data |
| bbt | BTwin Database |
| bbv | PPLive Cache File |
| bbw | Band-in-a-Box Interface |
| bbx | BrainBox Neural Net Data |
| bc | BitComet File |
| bc! | BitComet File |
| bc3 | FIEBDC Database |
| bc6 | Cashflow Manager 2006 Backup |
| bc7 | Cashflow Manager v7 Backup File |
| bc8 | Cashflow Manager v8 Backup File |
| bc9 | Cashflow Manager v9 Backup |
| bcd | ARM RealView Board/Chip Definition File |
| bcf | Binary Counterpart Data |
| bcf | MyLabel Designer Deluxe Data |
| bcf2 | Binary Counterpart Data |
| bcg | BusinessCards MX Gradients Data |
| bch | PCCharge Offline Transaction Log |
| bci | Belarc Advisor Report |