| bdw | Budget for Windows Data |
| bdy | DMAP Boundary Data |
| be | SEZ Online Bill of Entry Document |
| be | Paradox Query-By-Example Query |
| bed | BED Genome Annotation Track |
| bed | PLINK Binary Biallelic Genotype Table |
| bedg | Edge Data |
| beh | CRiSP Calibration Data |
| bek | BitLocker Encryption Key |
| bepf | Big Endian Prebuilt Format File |
| bes | Bitter End MOBY POS Database |
| bevel | FontTwister Letter Bevel Data |
| bew | PTV VISSIM Cost Data |
| bex | PGP Binary Extracted Public Key |
| bexpk | PGP Binary Extracted Public Key |
| bez | Bend-Tech v3 Part File |
| bf | libigl Skeletal Data |
| bf2 | BIDFAX 2000 Database |
| bfd | Binary File Descriptor Data |
| bfi | Blaise Database BFI Data |
| bfmv | BfMeshView Workspace Data |
| bfq | SmartWare Backup Query Definition |
| bfr | SmartWare Backup Report Definition |
| bfs | SmartWare Sort Definition Backup |
| bft | SmartWare Backup Transaction Definition |
| bfw | SmartWare Backup Cross-tab Definition |
| bfx | SmartWare Definition Backup |
| bgc | PnET-BGC Model |
| bgdb | Global Virtual Academy E-learning Data |
| bgeo | Houdini Geometry Data |
| bgf | Zemax Binary Glass Catalog |
| bgf | Molecular Simulations BIOGRAF Format File |
| bgo | BigOven Database |
| bgr | Girder Binary Plugin |
| bhd | Backup Exec Deduplication Storage |
