BRZ - BTG
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- BRZ - DbBRZ file for very large Db backup or restore
- BS - Infinity Game Engine Compiled Script ( BioWare Corp.)
- BS - PrintFox (C64) bitmap Header
- BS - Ball and Stick chemical modeller input file
- BS - Printfox / Pagefox image format
- BS - Ball and Stick chemical modeller output file
- BS1 - Apogee Blake Stone data file
- BS2 - Archive - BS2.EXE
- BS2 - Burning Sand 2 Code File
- BS2 - BS2 archive
- BS2 - BS2 editor file
- BS2 - Basic Stamp 2 Code File
- BS4 - Mikogo Session Video Recording
- BS_ - Microsoft Bookshelf Find Menu shell extension
- BSA - BSARC Compressed archive
- BSA - Data file used with Bethesda games
- BSAVE - Quickbasic BLOAD / BSAVE format
- BSB - SWAT Sub- basin Output File
- BSB - BioShock saved game
- BSB - BioShock Saved Game (2K Games )
- BSB - 2D Graphic file
- BSB - MapInfo sea chart
- BSC - Fortran Pwbrmake Object
- BSC - Apple II Compressed archive
- BSC - MS Developer Studio (MSDev) browser information
- BSCS - Strategy2Act Balanced Scorecard File (AKS- Labs )
- BSCT - Strategy2Act Balanced Scorecard Strategy File (AKS- Labs )
- BSD - bsd system file
- BSD - BASin data format
- BSD - Unknown Apple II File
- BSD - Licency according to BSD- licency ( licency.bsd)
- BSD - FacetWin Bitwise Backup Set ( FacetCorp )
- BSDF - ZEMAX scattering distribution data file
- BSDL - Boundary Scan Description Language
- BSE - CRiSP Harvest File
- BSF - Bridge - Soft Quarterly file
- BSF - Blu-ray AVC Video File
- BSF - Rainbow Six: Rogue Spear Buildspace File (Red Storm Entertainment Inc.)
- BSF - AVC Blu-ray video format file type
- BSH - BeanShell Script
- BSH - Bash file
- BSI - BSPlayer configuration
- BSI - BSI FutureComposer audio file
- BSK - Bryce 4 file
- BSK - Bryce 4 File (DAZ Productions )
- BSL - BSPlayer Configuration
- BSM - SQLMatcher Project File ( Berryware )
- BSM - Project file for SQLMatcher.
- BSM - Bioshock map
- BSN - MIDI File
- BSN - Autodesk TR-55 detention basin storage data file
- BSN - BSA packing program archive file
- BSN - BSN Midi file
- BSP - Quake map file
- BSPR - Need for Speed SHIFT track map
- BSQ - Oracle Control File
- BSQ - Apple II BINSCII - encoded ( Apple Inc.)
- BSQ - BCDown Download
- BSQ - BinScii 'd NuFX file
- BSQ - ArcView Image File ( Band Sequential )
- BSR - Simple Reads file
- BSS - Bridge Base file
- BST - BiblioTex file
- BST - BiblioTex file ( BiblioTex = bibliography file ) - TeX
- BST - Star Trek : Birth of the Federation Structure / Ship Info File
- BST - BibTeX Style File
- BSU - Brindys BriTray
- BSV - BASIC Bsave Graphics
- BSV - Bluespec SystemVerilog
- BSW - Business Scorecard Manager workspace file
- BSY - VTrain ( Vocabulary Trainer ) Learning Cardfile ( Paul Raedle )
- BSY - Busy flag - FTN soft
- BSY - FTN Soft Busy Flag
- BSZ - BSplayer Compressed Skin File ( BST2K Networks )
- BSZ - BSplayer Skin Header
- BT - VTBuilder - Binary Terrain v1.x Header
- BT - BluffTitler Show Header
- BT - BTwin project file
- BT - Binary Template Archive
- BT - Virtual Terrain Project Software
- BT - VTBuilder Binary Terrain
- BT - EVwin project file
- BT1 - Battery analyzer test file
- BT2 - Batch Barcode Maker file
- BT3 - Control Runner Button Configuration File ( MomSoft )
- BT5 - ERP5 Business template file
- BTAB - Base Guitar Tabulature
- BTAPP - uTorrent App
- BTC - Becker Tools compressed archive file
- BTD - Business -in-a-Box File ( BizTree Inc.)
- BTD - Data file
- BTD - Power To-Do List Data Header
- BTF - Nations Bank Check File
- BTF - Baires Turf Configuration File ( Zamaroht & Karel )
- BTF - Basi Office TypeFace document file
- BTF - Brother scanner file
- BTF - Bank check image and text data
- BTFL - Desktop DB
- BTG - FlightGear scenery file
- BTG - Binary TerraGear - FlightGear scenary data Header

