| bfw | SmartWare Backup Cross-tab Definition |
| bfx | SmartWare Definition Backup |
| bg00 | eXtendable Wad Editor BG00 Data |
| bgc | PnET-BGC Model |
| bgdb | Global Virtual Academy E-learning Data |
| bgeo | Houdini Geometry Data |
| bgf | Molecular Simulations BIOGRAF Format File |
| bgf | Zemax Binary Glass Catalog |
| bgo | BigOven Database |
| bgr | Girder Binary Plugin |
| bgt | Graphic Accounts Data |
| bh2pcm | eXtendable Wad Editor BH2PCM Data |
| bhd | Backup Exec Deduplication Storage |
| bhf | PCAnywhere Data |
| bhl | BlockHashLoc Data |
| bhm | BHM Hierarchical File Format Data |
| bho | Behold Organize Data |
| bhp | BHP Survey Tool Data |
| bhv | MicroStrategy Licensing Data |
| bhv | MonkeyLogic Behavioral Data |
| bia | ISaGRAF I/O Board Archive |
| biar | Business Intelligence Archive Resource |
| bibtex | BibTeX Bibliography Database |
| bid | BidMaker Data |
| bidlist | Bulk Image Downloader List Data |
| bidqueue | Bulk Image Downloader Queue Data |
| bidule | Bidule Layout Data |
| bii | Basilisk II Data |
| bikey | Bohemia Interactive Key |
| bim | GQT Variant Metadata |
| bim | PLINK Extended MAP File |
| bim | Zemax Binary Image Surface Data |
| bimd | Blue Ink Meta-data Export Data |
| bin | Macbinary Encoded |
| bina | Microsoft Word 5 for Mac Document |
