| autoplay | AutoPlay Media Studio Project |
| avenirproj | StoryMill Project |
| avp | Avid Media Composer Project |
| avrasmproj | Atmel Studio Legacy Assembler Project |
| awm | AllWebMenus Project |
| awx | ArcIMS XML Project |
| axp | AppGini v3 Project |
| b4f | Burn4Free Project |
| bamp | Easy Button and Menu Maker Project |
| band | GarageBand Project |
| 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 |
| bcpf | Bandicut Video Cutter Project |
| bcw | BusinessCards MX Project |
| bdsgroup | Borland Developer Studio Project Group |
| bdsproj | Borland Developer Studio Project |
| bhw | Blophome Published Project |
| bif | Get Backup Project |
| bifx | Get Backup Project |
| bimproject | BIM Server Project |
| bip | Blue Ink Project |
| blc | Biacore Instruments Project |
| bld | Broderbund 3D Home Architect Project |
| ble | BIAevaluation Project |
| bmo | SIMATIC WinCC Script |
| bmpr | Balsamiq Mockups Project |
