| brm | Kega Fusion RAM Backup Data |
| brml | Big Red Markup Language Code |
| brn | BrainStorm Data |
| brn | MegaHAL Brain Data |
| brn | Personal Brain File |
| bro | BR-532 Digital Studio Data |
| bro | Broadleaf Tree Model |
| brp | Bryce Brush Data |
| brp | E-Sword Bible Reading Plan |
| brpx | E-Sword Bible Reading Plan |
| brres | BRRES Resource Package |
| brs | Adobe RoboHelp Browse Sequence |
| brs | Corel Painter Brush Data |
| brs | WRAP Beginning Reservoir Storage Data |
| brstmspm | eXtendable Wad Editor BRSTMSPM Data |
| brt | Bryce Texture Data |
| brt | Micrografx Picture Publisher BRT Data |
| bru | Brutus Restore Data |
| brushlibrary | Corel Painter Brush Library |
| brushset | Procreate Brush Set Data |
| brushvariant | Corel Painter Brush Variant Data |
| brv | Brave Viewer Thumbnail Cache |
| brw | Calyx Point Borrower |
| brw | PhotoCool Thumbnail Cache |
| brx | Beam-Report Report Document |
| brx | BricsCAD Runtime Extension |
| brx | Epicor Portal Backup Data |
| bs4 | Mikogo Recorded Session |
| bs7 | Windows 7 Boot Updater Skin |
| bsb | NOAA Nautical Charts |
