| bphys | Blender Cache |
| bpj | Boxsim Simulation Data |
| bpk | Blaise Database BPK Data |
| bpm | Bizagi Process Modeler File |
| bpm | Sybase PowerDesigner Business Process Model |
| bpmc | Bizagi Process Modeler Team Collaboration File |
| bpmx | Business Process Model and Notation Data |
| bpo | DataFlex Business Process Object |
| bpp | Clarion App Backup |
| bpw | Intuit Quickbooks Business Planner File |
| bpwx | Blender GIS World Data |
| bpx | BusiPlan Data File |
| bqf | WaveWatch III Binary Quadrupled Data |
| 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 | Bible Reference Exporter Extracted List |
| bri | SeisWorks Bricked Seismic Data Format File |
| brn | BrainStorm Data |
| brn | Personal Brain File |
| 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 |