| bom | PTC Creo Bill of Materials File |
| bon | Binary Object Notation Document |
| bonds | Ribbons Bonds Definition |
| bones | XtalView Xfit Ridgelines Data |
| boo | Boo Encoded Data |
| book | Budget In Brief Budget Book |
| bookexport | BookSmart Exported Books Data |
| bootskin | Stardock BootSkin Data |
| boottrees | IQ-TREE Boot Trees Data |
| bop | Vflo Model Data |
| bopx | Vflo Model Data |
| bov | VisIt BOV File |
| bow | Back Orifice 2K Workspace |
| box | CARA Loudspeaker Design |
| box | Kodicom Video Metadata |
| box | VTrain Box Data |
| boxr | Boxerjam Data |
| bp | DataFlex Business Process Object |
| bp2 | Autodesk AutoCAD Batch Plot File |
| bp3 | Autodesk AutoCAD Batch Plot File |
| bpa | StorageSync Backup Archive |
| bpb | Sybase PowerDesigner Business Process Model Backup |
| bpc | BuildProfessional Client Data |
| bpd | Business Plan Pro Plan |
| bpdx | Business Plan Pro Plan |
| bpf | BatchPhoto Profile Data |
| bpf | Business Plan Pro Formula |
| bpf | F-Secure Base Policy File |
| 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 |
