| baseproj | DNA Baser Sequence Alignment Project |
| baserproj | DNA Baser Sequence Alignment Project |
| bbmodel | Blockbench Project |
| bbproject | BBEdit Project |
| bbprojectd | BBEdit Project Package |
| bcard | Business Card Composer Project |
| bcp | Bamcompile Project |
| bcpf | Bandicut Video Cutter Project |
| bcw | BusinessCards MX Project |
| bdsgroup | Borland Developer Studio Project Group |
| bdsproj | Borland Developer Studio Project |
| bfp | Quest Benchmark Factory Project |
| bhw | Blophome Published Project |
| bif | Get Backup Project |
| bifx | Get Backup Project |
| bil | RiadaBillboard Project |
| bimproject | BIM Server Project |
| bip | Blue Ink Project |
| biz | ArcSoft ShowBiz Project |
| blc | Biacore Instruments Project |
| bld | Broderbund 3D Home Architect Project |
| bld | EnergyPRO Project |
| bld | Envisioneer Building Project |
| ble | BIAevaluation Project |
| bls | Biacore BIAlite Project |
| bmc | Bolide Movie Creator Project |
| bmo | SIMATIC WinCC Script |
| bmpr | Balsamiq Mockups Project |
| bmte | Bome Midi Translator Pro Encrypted Project |
| bmtp | Bome Midi Translator Pro Project |
