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    File extensions starting with B

    B IBM Lotus Applause Batch List Format
    B!K Microsoft Flight Simulator Scenery
    B&W Bitmap Image
    B00 Blindwrite
    B01 BlindWrite Image
    B02 BlindWrite Image
    B1 B1 Compressed Archive
    B16 PCO Image
    B2 Progress Database
    B24 Ovation Pro For RISC OS C Script
    B25 Ovation Pro For RISC OS DDL
    B26 Ovation Pro For RISC OS Style Sheet
    B27 Ovation Pro For RISC OS Document
    B2A Binary To ASCII (BTOA) Encoded Format
    B2D Brutus2D Source Code
    B2F RISC OS Windows Metafile
    B30 Ventura Publisher Printer Font
    B3D BodyPaint 3D Format
    B3P Native Instruments Battery Preset
    B4S Winamp 3 Playlist Format
    B4U Visual ReadMe
    B5 MDBG Chinese-English Dictionary
    B5I BlindWrite Image Format
    B5L BlindWrite Image
    B5T BlindWrite Image Format
    B60 RISC OS PNG Bitmap Image
    B64 ASCIIi Base64 MIME Encoded Archive Format
    B6I BlindWrite Image Format
    B6L Blindwrite License
    B6T BlindWrite Table Of Contents Format
    BA Scifer Archive External Archive Format
    BA1 Microsoft Windows Media Center Report Log
    BABL DeBabelizer
    BAC Backup Plus Backup Format
    BACK RMCProfile Coefficient
    BACKUP Backup Of Current ISAPI Application
    BACKUPDB Apple Time Machine Backup Folder Format
    BAD Microsoft Exchange Badmail Format
    BADONGO Badongo Information Service
    BAF Battlefield 2 Animation
    BAFL BurnAware Free Compilation Format
    BAG PMMail Mail Index
    BAI BUILD2WIN Add-in
    BAK Backup Plus Backup Format
    BAK2 Microsoft FrontPage
    BAK3 Crysis Backup
    BAK~ AbiWord Auto-saved Document Format
    BAL Borland Programming Language Source Code
    BAM Bobs Adlib Music
    BAMBOOPAPER Bamboo Document
    BAMP Easy Button & Menu Maker Project
    BAN MegaHAL Non-keyword List
    BAND GarageBand Music Project Format
    BAP Blaze RipEditBurn Audio Wave Information Format
    BAR Age Of Empires / Age Of Mythology Game Format
    BAS Basic Source Code Format
    BASEBINARY Apple Mac OS X AirPort Base Station Binary
    BASECONFIG AirPort Utility Setting
    BASEPROJ DNA Baser Sequence Aligner Project
    BASERPROJ DNA Baser Project Format
    BASEX BaseX Data Format
    BASH Unix Shell Script (bash)
    BASHRC Bash Shell Startup Script Configuration Format
    BASH_HISTORY Bash History Format
    BASH_LOGIN Unix Shell Script (bash)
    BASH_LOGOUT Unix Shell Script (bash)
    BASH_PROFILE Bash Interactive Login Shell Format
    BASIN HEC-HMS Basin Model Settings
    BAT Batch File (executable)
    BATCH Switchball Game Data
    BAU OpenOffice.org Configuration Format
    BAV AVG Bat! Plugin Format
    BAW BrainLED AlfaWave Session
    BAY Kodak/Roper Bayer Picture Sequence Format
    BAZ Acomba Accounting Suite Backup
    BA_ Renamed BAT Format
    BB Blitz Basic Source Code Format
    BB2 XBBS-OS/2, XGROUP, AV, ZTree Archiver Control
    BB3 BlasterBall 3 Level Format
    BBA BlueByte Archive
    BBB BlackBerry Backup (post 2012) Format
    BBC BBC BASIC For Windows
    BBCD BobCAD-CAM Document
    BBE MindGenius Brainbloom
    BBF ScriptBasic Binary
    BBFW ITunes Firmware
    BBG CyberSports For Basketball Game
    BBI LinkOne Data
    BBK TreePad Backup
    BBL TeX/BibTeX Bibliographic Reference Format
    BBLM Mario Kart Mod Effect Format
    BBLX E-Sword Bible
    BBPROJECT BBEdit Project Format
    BBPROJECTD BBEdit Project Format
    BBRKPUZZLE Puzzle
    BBRKSAVE Puzzle Started Status
    BBS Bulletin Board System Text Format
    BBT BTwin Local Database
    BBTL BBEdit Tool Palette
    BBV PPLive
    BBW Band-in-a-Box Nterface
    BBX BrainBox Neural Network
    BBXT BBEdit
    BBZ BeBuzz Backup Format
    BC Bittorrent Unfinished Download Format
    BC! Bittorrent Unfinished Download Format
    BC5 Impression Document
    BC6 Cashflow Manager 2006 Backup
    BC7 Cashflow Manager 2007 Backup
    BCA Allplan Backup Catalog
    BCB Borland C++ Builder
    BCC Borland C++ Format/makefile
    BCD Microsoft Windows Boot Configuration Format
    BCF Business Card Designer Pro Business Card Design Format
    BCH Datalex Entrypoint 90 Data
    BCI Belarc Advisor Computer Profile Report
    BCK VMX Backup Format
    BCKP Ad-Aware Quarantined Format
    BCL Illumina CASAVA Base Call Format
    BCM Business Contact Manager Format
    BCMX Microsoft Outlook Business Contact Manager Customization Format
    BCN Business Card Design
    BCP Borland C++ Makefile
    BCR Map&guide Station List
    BCS Boland Calibration Settings Format
    BCT Adobe Bridge Cache Format
    BCW Borland C++ Workspace
    BCX Beam Report Standard Definition
    BD BenDaglish Audio
    BD1 Map Block Location
    BD2 Lacerte Tax Tax
    BDAE Gameloft Game Data Format
    BDB Microsoft Works Database Backup Format
    BDB2 BrainMaster Settings
    BDC Lingvo Dictionary Format
    BDCM Microsoft Visual Studio BDC Model
    BDCR Microsoft Visual Studio BDC Resource
    BDCT BBEdit Dictionary
    BDD CARA Sound Radiation Data Format
    BDE Pro/ENGINEER Temporary
    BDF Bdiff Bupdate Binary Update Format
    BDG Badge Designer 2000 Photo ID
    BDH Silk Performer Include
    BDI Pro/ENGINEER Temporary
    BDIC Google Chrome Dictionary Format
    BDJO Java BD-J Object Descriptor
    BDK OS/2 Floppy Disk Image
    BDL CoCreate Designer Bundle Format
    BDM AVHCD Video Information Or Index Format
    BDMV Blu-ray Information Format
    BDOC DigiDoc Client Container
    BDOF Mario Kart Mod Effect
    BDP Microsoft Exchange Diagnostic Message
    BDR Microsoft Publisher Border Format
    BDS Cadcorp SIS Base Dataset
    BDSGROUP BDS Project Group
    BDSPROJ BDS Project Format
    BDT Lingvo Dictionary
    BDT2 BEEDOCS Timeline 3D Timeline Document Format
    BDT3 BEEDOCS Timeline 3D Timeline Document Format
    BDTD Java Sun Binary DTD
    BDTP BaiduPlayer Media
    BDV BitDefender Vault
    BDW Budget Data
    BDX BitDefender
    BDY DMAP Boundary
    BEA Beamer Song
    BEAM Compiled Erlang Code Format
    BEAN Bean Document Format
    BEB EEC Analyzer
    BED UCSC BED Annotation Track Format
    BEE Bee Archiver Compressed Archive
    BEH CRiSP Calibration
    BEJEWELED2DELUXESAVEDGAME Bejeweled 2 Deluxe Save Game Format
    BEK Shanda Bambook E-book
    BEL Belon Compressed Archive
    BEN SiSoftware Sandra
    BEP Beamer Playlist
    BES MOBY Database
    BET BETA Source Format
    BEVEL FontTwister Bevel
    BEX BOOM Extensions To Dehacked
    BEXPK PGP Binary Extracted Public Key
    BF Beyond Good & Evil Game Archive Format
    BFA Blowfish-encrypted Format
    BFB Zoo Tycoon 2 Game Model
    BFC Microsoft Windows 95 Briefcase Document Format
    BFD Linux BFD Rules Configuration
    BFE Bcrypt - BlowFish File Encryption
    BFF AIX Backup Format
    BFFM B-17 Flying Fortress: The Mighty 8th Game
    BFG Mario Kart Mod Effect Format
    BFI Blaise Index
    BFL Colin McRae Rally 2 Game
    BFLI BFLI Image Format
    BFM Terminal Reality Model Format
    BFMV BfMeshView Workspace
    BFONT Need For Speed SHIFT Font
    BFP Benchmark Factory Project
    BFR Network Instruments Observer
    BFS SmartWare Backup Sort Definition Format
    BFT SmartWare Backup Transaction Definition
    BFW SmartWare Backup Cross-tab
    BFX Bitware BitFax Format
    BGA OS/2 Graphic Array
    BGCF Greeting Card Design
    BGD ESRI Binary Raster Definition
    BGEO Houdini Binary Geometry Format
    BGF ZEMAX Binary Glass Catalog
    BGI BGInfo Configuration Format
    BGL Microsoft Flight Simulator Scenery Data Format
    BGM Basic4GL 3D Object
    BGO Bigoven Recipe Card
    BGR Girder Binary Plugin
    BGT Graphic Accounts Account Data Format
    BGUI Need For Speed SHIFT GUI
    BGV BonanzaGraf Financial Presentation
    BGW Final Fantasy Music
    BGZ Blood Frontier Map Format
    BH ZipTV BlakHole Archive File Format
    BH3 Rise Of Nations Unit Graphic
    BHA Rise Of Nations Unit Graphic
    BHF PcAnywhere Host
    BHO Behold Settings Format
    BHP BHP Survey Tool Data
    BHS Rise Of Nations Script
    BHX BinHex Compressed File ASCII Archive
    BI Microsoft Visual Basic For DOS Include
    BI? LoseThos Binary Executable
    BIB BibTeX Document Format
    BIBTEX BibTeX Document
    BIC Civilization III Game Scenario Format
    BID BidMaker
    BIDULE Plogue Bidule Sound Layout Format
    BIE JBIG Image
    BIF TomTom Navigator General Info Format
    BIFX Get Backup Project
    BIG Electronic Arts Game Resource Package Format
    BIK BINK Video Format
    BIKEY Bohemia Interactive Key
    BIL ArcView Band Interleaved By Line Image Format
    BIM Bytessence InstallMaker Project Format
    BIMD Blue Ink Meta-data Export
    BIMX ArchiCAD BIMx 3D Scene
    BIN CD/DVD Binary Image Format
    BIN3 LabVIEW Data
    BINA Microsoft Word 5 For Mac Document
    BINARYCOOKIES Safari Browser Cookies Package
    BINUI Call Of Juarez Game Menu
    BIO OS/2 BIOS Format
    BIOEXCESS MyWinLocker Protected
    BIONIX Bionix Wallpaper List Format
    BIOT BiotSavart Magnetic Design
    BIP Character Studio Biped Format
    BIQ Civilization 3 Scenario Format
    BIT Xilinx Integrated Software Environment Bitstream Format
    BITCFG Passmark Configuration
    BITMAP X Window System Bitmap Image
    BITPIM BitPim Configuration Format
    BIX Civilization III Scenario Format
    BIZ Print Shop Business Card Format
    BIZDOCUMENT Actuate BusinessReport Studio Document
    BJF NTI Backup Now Related
    BJK Blaise
    BJO Instrument Tablature Format
    BK Adobe FrameMaker Book Format
    BK! Corel WordPerfect Document Backup
    BK0 Aspen HYSYS Backup
    BK1 Autodesk AutoCAD Backup Format
    BK2 Windows Indexing Service Data Format
    BK3 Corel WordPerfect Document Backup
    BK4 Corel WordPerfect Document Backup
    BK5 Corel WordPerfect Document Backup
    BK6 Corel WordPerfect Document Backup
    BK7 Corel WordPerfect Document Backup
    BK8 Corel WordPerfect Document Backup
    BK9 Corel WordPerfect Document Backup
    BKB VariCAD Drawing
    BKC Backup4all Catalog Format
    BKD Book Library Local Dos Exploit
    BKF Microsoft Backup Format
    BKG UWXAFS Project Binary Format Data
    BKI IBM BookManager Backup Index
    BKK BookBuddi EBook Format
    BKMK Yummy FTP Bookmark Format
    BKO Wisco Backup Outlook Backup
    BKP Backup Plus Backup Format
    BKR ReplaceEm File Set
    BKS Microsoft Works Spreadsheet Document Backup Format
    BKU Timeslips Backup
    BKUP Backup Plus Backup Format
    BKW FontEdit Image
    BKY Bookkey Bookmark/keyword Data
    BKZ FileFort Backup
    BLA Adobe Black Colour Separation
    BLACKHAWKSTRIKER2 Blackhawk Striker 2 Saved Game
    BLACKHAWKSTRIKER2SAVEDGAME Blackhawk Striker 2 Saved Game
    BLASTERBALL2DRM3SAVEDGAME Blasterball 2 Save Game
    BLASTERBALL3SAVEDGAME Blasterball 3 Save Game Format
    BLB Blob Format
    BLD MegaPaint Picture Image Format
    BLEND Blender 3D Data Format
    BLEND1 Blender Backup Format
    BLEND2 Blender Document Backup Format
    BLF Microsoft Windows Vista And Windows 7 Registry Format
    BLG Microsoft Windows Binary Performance Log Format
    BLI Thomson Speedtouch Series WLAN Router Firmware Format
    BLIGHT Mario Kart Mod Effect
    BLK AutoCAD Block Template Format
    BLKRT Block Artist Image Format
    BLL Borland Delphi Localization Information
    BLM Eurolink Comma Separated Value
    BLN Golden Software Blanking File Format
    BLOB Steam Client Registry Format
    BLOCKPLT LEGO MINDSTORMS NXT Palette Format
    BLOGTHIS Microsoft Windows Writer BlogThis Data Format
    BLP Blizzard Game Texture Format
    BLS Blockland Saved Game
    BLT AIM AOL Instant Messenger Saved Buddy List
    BLU FileMaker Pro Runtime Extension Format
    BLUE EVE Online Texture
    BLUEBUTTON VA Blue Button Text
    BLV Might And Magic 6/7 Dungeon Level Geometry
    BLW Adobe Photoshop Black And White Presets Format
    BLX Magellan MapSend Map Data
    BLY FIFA World Cup Game Data Fe Art Load Game
    BLZ Nokia N-Gage Game Format
    BM X Windows System Bitmap Image
    BM2 Subspace/Continuum Bitmap Graphic Format
    BM3 Sony Ericsson Backup Format
    BMA Compressed Archive
    BMB Pro/ENGINEER Temporary
    BMC Microsoft Terminal Server Client Bitmap Cache Format
    BMD Nintendo GameCube 3D Model Format
    BMD5 BookmarkingDaemon
    BME Konami Beatmania Music Simulator Format
    BMF Corel Gallery Binary Material Format
    BMG Mario Kart Wii Message Format
    BMI 3D Studio Max Plugin
    BMK Bookmark Format
    BML Bean Markup Language Format
    BMM Tacmi Pixia Palette
    BMML Balsamiq Mockups Graphic
    BMO SIMATIC WinCC Script
    BMP Standard Windows Bitmap Image (also OS/2)
    BMP24 Bitmap Graphic
    BMPENX Encrypted BMP
    BMQ Re-Volt Texture
    BMS Beatmania Music Simulator Format
    BMT Alpha Five Image Library
    BMU BioWare Music Unit
    BMW W32/Liji-A Virus
    BMX Siemens Mobile Phone Animation Format
    BMZ Compressed Bitmap Format
    BN4 Yamaha DX100 Voice
    BNA Atlas Boundary Format
    BNC Bojanov Encryptor Encrypted
    BND Neighbours From Hell Game Archive
    BNDL Bundle File Format
    BNF IBM Voice Type Languages Map
    BNG Bingo Maker Bingo Data Template Format
    BNHQ BinHex Archive
    BNI Blizzard Battle.Net Icon
    BNK Test Drive Unlimited Game Data Format
    BNL MicroSim PCBoard Netlist
    BNP Sony HD Camera System Format
    BNR Nintento Wii Homebrew
    BNS Portal Script Format
    BNT Entropia Universe Game Archive
    BNY Binary Ll Format
    BNZ Bingo Maker Bingo Template Or Bingo List Update Format
    BOB BOB Raytracer Bitmap Image
    BOBO ClarisWorks
    BOBTHEBUILDERSAVEDGAME Bob The Builder: Can Do Zoo Save Game
    BOC E-Press EasyWord Big Document Format
    BOCHSRC Bochs Configuration
    BOD X3 Reunion Ship
    BOE Microsoft Outlook Express Backup
    BOF IBM Voice Type Languages Tasks Enroll
    BOH Europa Universallis 2 Game Data
    BOK TestGen Test Bank Format
    BOL Mario Kart Course Setup
    BOM Apple Mac OS X Bill Of Materials Format
    BONDS Ribbons Bonds
    BONK Bonk Audio Format
    BOO Microsoft Booasm.arc Encoded File Archive
    BOOK Adobe FrameMaker Book Format
    BOOKEXPORT Booksmart Export Format
    BOOKTEMPLATE IBooks Author Book Template Format
    BOOKWORMDELUXESAVEDGAME Bookworm Deluxe Saved Game
    BOOT InstallShield Format
    BOOTEFISIGNATURE Bootefisignature Mac OS X System
    BOOTSKIN Microsoft Windows Boot Skin
    BOOTSTRAP Adobe HTTP Dynamic Streaming Bootstrap
    BORLAND Borland C Makefile
    BOS Fallout Tactics Game Archive
    BOT Robot Arena Game
    BOX FoxMail E-mail Box
    BOX3D Box Shot 3D Project
    BOXER Boxer For Mac Game Archive
    BOZ Bzip Compressed Archive
    BP DataFlex Business Process Object
    BP0 SmartWare Backup Project
    BP1 Smartware Backup Document
    BP2 Autodesk AutoCAD Batch Plot Format
    BP3 Autedesk AutoCAD Batch Plot Format
    BP4 SmartWare Backup Project
    BPA StorageSync Backup Archive Format
    BPB PowerDesigner Business Process Backup Format
    BPC BuildPro
    BPD Pscript Binary PostScript Printer Description Format
    BPDX Adobe Acrobat Catalog Batch PDX Format
    BPF BatchPhoto Profile Format
    BPG Delphi Project Group Format
    BPI IBM Voice Type Languages New User
    BPJ Boxsim Simulation
    BPK Nero SecurDisc Public Key Format
    BPKEY Blender Publisher License Key
    BPL Delphi Packed Library Format
    BPM Battle Planner Module Format
    BPMC Bizagi Process Modeler
    BPMN Avantage Template
    BPN ArchiCAD Backup Format
    BPNUEB Payame Noor University (PNU) E-book Format
    BPO DataFlex Business Process Object
    BPP Clarion Backup Application
    BPR Borland C++ Builder XML Project Format
    BPS Microsoft Works Document Backup Format
    BPSD Backup Plus
    BPT CorelDRAW Bitmap Master
    BPV BallPark Business Valuation Valuation Scenario
    BPW ArcView World File For Bip Or Bmp Images
    BPX Truevision TarGA Bitmap Image
    BPZ Easy Blue Print Library
    BQF Backdoor.Win32.Ciadoor.bqf Trojan
    BQW ArcView World
    BQY BrioQuery Database Format
    BR Omnis Data
    BR1 Total Commander Cached Button Bar Icons
    BR2 Total Commander Cached Button Bar Icons
    BR3 Bryce 3D Scene Format
    BR4 Bryce 4 Scene Format
    BR5 Bryce 5 Scene Format
    BR6 Bryce 6 Scene Format
    BR7 Bryce 7 Scene Format
    BRA Linux
    BRAGG Bragg Profile
    BRAIN PersonalBrain Mind Map Format
    BRASD Mario Kart Mod
    BRB Bryce Object Export
    BRC Bryce 2 Scene
    BRD EAGLE Circuit Board Format
    BRE Breuckmann Scanner
    BREFF Mario Kart Wii Animated Graphic
    BREFT Mario Kart Wii Animated Graphic
    BREP 3D Model
    BREW Homebrew
    BRF Braille Format
    BRFNT Mario Kart Wii Font
    BRG Age Of Mythology 3D Game Model Format
    BRH Baraha
    BRI Bryce Plug-in Format
    BRIDGECACHE Adobe Bridge Cache
    BRIDGECACHET Adobe Bridge Cache
    BRIDGELABELSANDRATINGS Adobe Bridge
    BRIDGESORT Adobe Bridge Cabinet
    BRIDGESUPPORT Bridgesupport Mac OS X File Extension
    BRK Brooktrout Fax Format
    BRLCAD BRL-CAD 3D
    BRLYT Nintendo Wii Texture Settings Format
    BRM Bryce Plug-in Format
    BRN BrainStorm Data Format
    BRO Tree Professional Broadleaf Creator Format
    BROGUESAVE Brogue Saved Game
    BROWSER ASP.NET Browser Definition Format
    BRP Tree Professional Broadleaf Creator Image
    BRPX E-sword Bible Reading Plan
    BRRES Wii BRRES Resource Package
    BRS Adobe RoboHelp Browse Sequence Format
    BRSAR Audio Format
    BRSTM Audio Format
    BRT Booria Carpet Designer Robotuft Project
    BRTEX Wii BRTEX Texture
    BRU Brutus Restore
    BRV BraveViewer Thumbnail Cache
    BRW PointCentral Financial Institutions Loan Format
    BRX BREW MP Application Resource Format
    BRY2 Bryce 2
    BS Printfox/Pagefox Image Format
    BS1 VirtualBus Format
    BS2 BASIC Stamp 2 Code Format
    BS4 Mikogo Session Video Recording Format
    BS7 Windows 7 Boot Updater Boot Animation Format
    BSA Bethesda Softworks Archive Format
    BSAVE Quickbasic BLOAD/BSAVE Format
    BSB MapInfo Sea Chart Format
    BSC Microsoft Visual Studio Visual C++ Source Browser Information Format
    BSCS Balanced Scorecard Designer
    BSCT Balanced Scorecard Designer Strategy
    BSD BSDL Format
    BSDF ZEMAX Scattering Distribution Data
    BSDIFF Cygwin
    BSDL Boundary Scan Description Language Format
    BSE CRiSP Harvest
    BSF AVC Blu-ray Video Format
    BSH BeanShell Script Format
    BSI Microsoft SharePoint Server 2007 Temporary
    BSK Bryce 4 Format
    BSL BSPlayer Configuration
    BSM Bioshock Map
    BSMX BeerSmith
    BSMZ Compressed BSML
    BSN Autodesk TR-55 Detention Basin Storage Data
    BSON BSON Binary JSON
    BSP Quake 2 Map Format
    BSPR Need For Speed SHIFT Track Map
    BSPROJ Banned Story Project
    BSQ BinScii Binary Archivne
    BSR Bacula Restore
    BSS Resident Evil Background Images Format
    BST BiblioTex Format
    BSV Bluespec System Verilog
    BSW Business Scorecard Manager Workspace
    BSWX Microsoft Office PerformancePoint Server Database
    BSX PBASIC Preprocessor Output
    BSY VTrain Learning Cardfile
    BSZ BSplayer Compressed Skin
    BT VTBuilder Binary Terrain Format
    BT! BitSpirit Incomplete Download Format
    BT0 Band-in-a-Box Temporary
    BT1 Battery Analyzer Test
    BT2 Batch Barcode Maker
    BT3 Control Runner Button Configuration
    BT5 ERP5 Business Template
    BTAPP UTorrent Application Format
    BTD Business-in-a-Box Document Format
    BTF NationsBank Check Images
    BTG FlightGear Scenery
    BTH Bathy Recorder Data
    BTI Nintendo Texture Format
    BTIF NationsBank Check Image Format
    BTINSTALL BitTorrent Installation Format
    BTK CLwin Tekton Database
    BTKEY BitTorrent License Key
    BTL SolidWorks Sheet Metal Bend Table
    BTM Microsoft BizTalk Map Format
    BTN Just Buttons Animated Bitmap Image Format
    BTO Bryce Tree Format
    BTOA Binary-to-ASCII File Format
    BTR Btrieve Database Format
    BTREE Apple Mac OS HFS+ B-tree
    BTS Creative Digital Blaster Digital VCR
    BTSEARCH BitTorrent Search Engine Specification Format
    BTSKIN µTorrent Skin
    BTST Norton SystemWorks Info
    BTT ICQ Find Users
    BTU Diablo BTU Calculator
    BTW BarTender Barcode Label Format
    BTWSENDTO Microsoft Windows Bluetooth Related
    BTX InMagic Database Term/word Index
    BTY Railroad Tycoon 3 Building
    BU Pegasus Mail Temporary
    BUB Photobubble
    BUC Adobe Photoshop Elements Backup
    BUD Pscript Binary PostScript Printer Description Format
    BUF Buffer Format
    BUFFEREDIMAGE Java Class
    BUGSENSE BugSense
    BUILD NAnt Build Tool
    BUILDALOT2SAVEDGAME Build-a-lot 2 Save Game
    BUILDALOT3SAVEDGAME Build-a-lot 3 Saved Game
    BUILDER Builder Script
    BUILDPATH Eclipse XML Build Path Format
    BUJ Personal Backup Saved Task
    BUL Bullseye Data Format
    BUM Poser Bump Files Image Format
    BUN CakeWalk Audio Bundle Format
    BUNDLE Mac OS X Application Extension
    BUNDLEDMESH Battlefield Bundled Mesh
    BUP Backup Of DVD Info Format
    BUR BuRg3r Source Code Format
    BURN Burn For Mac OS X Document
    BURNOUTPARADISESAVE Burnout Paradise Saved Profile
    BURNTHEME Burn For Mac OS X Theme Document
    BUS VirtualBus Bus Route Settings Format
    BV1 Corel WordPerfect Overflow
    BV2 Corel WordPerfect Overflow
    BV3 Corel WordPerfect Overflow
    BV4 Corel WordPerfect Overflow
    BV5 Corel WordPerfect Overflow
    BV6 Corel WordPerfect Overflow
    BV7 Corel WordPerfect Overflow
    BV8 Corel WordPerfect Overflow
    BV9 Corel WordPerfect Overflow
    BVC IBM Voice Type Languages Newuser
    BVD BitDefender Vault Format
    BVH Biovision Hierarchy Animation Format
    BVI IBM Voice Type Languages Newuser
    BVL Micrografx Picture Publisher 8 Textures
    BVP Bluevoda Website Builder Format
    BVR Blue Iris Video Format
    BVS BVS Solitaire Collection
    BVW SmartWare Backup Standard View
    BVX OptiTune Install Package
    BVXD OptiTune Manifest
    BW Silicon Graphics Image
    BW1 FMEA Database
    BWA BlindWrite BWA Builder Physical CD Characteristics Format
    BWC BeadWizard Color Palette
    BWD Colin McRae Rally 2 Car Description
    BWE Black And White 2 Environment Data
    BWF Broadcast Wave File Format
    BWG BrainWave Generator Format
    BWI BlindWrite CD/DVD Image Format
    BWM Blaise
    BWP BuRg3r Web Page
    BWS BlindWrite Subchannel Data Format
    BWT Blindwrite Control Format
    BWU Blindwrite CD Copier
    BWW Bagpipe Music Writer Music Notation Format
    BWZ WinImage Batch Configuration
    BX Opera
    BXB BasicX Compiled Project Bytecode
    BXI Blaise
    BXL Accelerated Designs PCB Library Format
    BXM BasicX-24 Basic Express Compiler Map
    BXML Bean XML
    BXP BasicX-24 Basic Express Compiler Module List
    BXRC Configuration
    BXU PictureGear Studio
    BXX BlaxxunContact Format
    BXY NuFX Archive Within A Binary II Envelope
    BY PSpice
    BYU Movie.BYU Geometry Format
    BZ BZIP Compressed File Archive
    BZ1 WinTOTAL Automatic Backup
    BZ2 Bzip2 Compressed File Archive
    BZA Bzip2 Compressed File Archive
    BZABW AbiWord Bzip2 Compressed Document Format
    BZIP Bzip Compressed Archive
    BZIP2 BZIP Compressed Archive Format
    BZM Business Map
    BZN Star Trek Armada Map
    BZP2 BZIP2 Archive
    BZS BlueZone Script
    BZW BZFlag Map Format
    BZZ BuzzBundle Project