| bqm | Bernina Q-matic Design |
| bqs | BillQuick Database |
| bqy | Oracle Hyperion Interactive Reporting Document |
| br25 | BMW iDrive Multimedia Data |
| bragg | RMCProfile Bragg Scattering Data |
| brain | Personal Brain v6 File |
| brb | Bryce Object Export |
| brdf | Disney BRDF File |
| bre | Breuckmann Scanner Data |
| bre | Bible Reference Exporter Extracted List |
| bri | SeisWorks Bricked Seismic Data Format File |
| brml | Big Red Markup Language Code |
| brn | Personal Brain File |
| brn | BrainStorm Data |
| brp | E-Sword Bible Reading Plan File |
| brres | BRRES Resource Package |
| brs | Adobe RoboHelp Browse Sequence |
| bru | Brutus Restore Data |
| brushset | Procreate Brush Set Data |
| brv | Brave Viewer Thumbnail Cache |
| brw | Calyx Point Borrower |
| bs4 | Mikogo Recorded Session |
| bsb | NOAA Nautical Charts |
| bsb | Xilinx Base System Builder Playback File |
| bsca | IBM System/3 BSCA Data |
| bsd | FacetWin Backup Set Description |
| bsd | Xilinx BSDL File |
| bsdl | Xilinx BSDL File |
| bsig | ClamAV Binary Signature |
| bsk | Blaise Database BSK Data |
