| .BC | BitComet Development Group | Ikke Almindelige Filer | BitComet Partially Downloaded File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BCM | Adobe Systems Incorporated | Datafiler | Adobe Bridge Cache File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BCP | Blackmagic Design | Indstillingsfiler | BlackMagic Custom Palette | Adobe Photoshop | Adobe Systems Incorporated |
| .BCT | Adobe Systems Incorporated | Datafiler | Adobe Bridge Thumbnail Cache File | Adobe Bridge CC | Adobe Systems Incorporated |
| .BDL | Parametric Technology Corporation | CAD-filer | CoCreate Bundle File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .BITMAP | Various Developers | Rasterbilledfiler | Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .BK | Adobe Systems Incorporated | Datafiler | FrameMaker Book File | Adobe FrameMaker | Adobe Systems Incorporated |
| .BLA | Adobe Systems Incorporated | Datafiler | Adobe Black Colour Separation Data | Adobe Creative Cloud | Adobe Systems Incorporated |
| .BLW | Adobe Systems Incorporated | Indstillingsfiler | Adobe Photoshop Black And White Presets File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .BLZ | Nokia | Spilfiler | N-Gage Mobile Video Game File | Adobe Photoshop | Adobe Systems Incorporated |
| .BMP | Various Developers | Rasterbilledfiler | Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .BMZ | Valve | Spilfiler | Portal Bonus Map Zip File | Adobe Photoshop | Adobe Systems Incorporated |
| .BOOK | Adobe Systems Incorporated | Datafiler | FrameMaker Book File | Adobe FrameMaker | Adobe Systems Incorporated |
| .BPDX | Adobe Systems Incorporated | Ikke Almindelige Filer | Acrobat Batch PDX File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .BRIDGESORT | Adobe Systems Incorporated | Indstillingsfiler | Adobe Bridge Cabinet | Adobe Bridge CC | Adobe Systems Incorporated |
| .BRS | Adobe Systems Incorporated | Datafiler | RoboHelp Browse Sequence File | Adobe RoboHelp | Adobe Systems Incorporated |
| .BUC | Adobe Systems Incorporated | Sikkerhedskopifiler | Adobe Photoshop Elements Backup File | Adobe Photoshop Elements | Adobe Systems Incorporated |
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