| bdtd | Java Binary DTD Data |
| bdx | VisionICE Flat Binary Downloadable |
| beam | Erlang Compiled BEAM File |
| ber | ASN-1Step Basic Encoding Rules Data |
| bet | BETA Source Code |
| beta | BETA Source Code |
| bfo | GT Nexus PDF Template |
| bgm | Basic4GL 3D Model |
| bgn | Xilinx Vivado Bitgen Data |
| bhtml | BabuHTML Embedded Software |
| bi | BSC Intermediate Object |
| Microsoft Visual Basic Include |
| OpenEdge ABL Before Image |
| bin | Crestron SIMPL Binary Output Data |
| Windows CE Emulator Image |
| bin3 | LabVIEW Binary Data |
| bingo | Bingo Project |
| bin_ | Emu8086 Assembly Source Code |
| birds | Bird Script Source Code |
| birt | BIRT Data |
| bkc | WebDev Class Backup Data |
| bke | WebDev Report Backup Data |
| bkg | WebDev Procedures Backup Data |
| bkh | WebDev Help Backup Data |
| bkp | WebDev Project Backup |
| bkr | WebDev Query Backup Data |
| bkt | WebDev Template Backup Data |
| bkw | WebDev Window Backup Data |
| bky | MIT App Inventor Blocks XML Data |
| bld | QuickBasic BLOAD Image |
| SPLat Build File |
| Xilinx ISE Build Data |
| bli | PDP-10 BLISS-10 Compiler Source Code |
| blk | ProWorx NXT Block Data File |
| Win32Forth Block Data |
| bll | Delphi Localization Data |
| bltx | BlaTeX Source Code |
| bluej | BlueJ Package |
| bml | Alpha Five Image Library |
| Bean Markup Language File |
| Better Markup Language File |
| Binary Markup Language Data |
| bmm | Xilinx PROMgen BMM Data |
| bms | QuickBMS Script |
| bmt | Alpha Five Image Library |
| bmx | Alpha Five Image Library |
| bo | BSC Intermediate Object |
| boc | Hitachi Ladder Editor Box Comment |
| bog | Niagara Ax BOG File |
| bok | ProStores Dynamic Web Page |
| boot | InstallShield Boot File |
| borland | Borland C Makefile |
| bos | IBM Rational ClearCase Build Options Specification |
| bpg | Borland Project Group |
| bpi | Borland Package Import |
| bpk | Borland Package |
| bpl | Borland Package Library |
| bql | SensorBee BQL Script |
| br | Omnis Studio Data File |
| brc | BASIS Binary Resource Data |
| brh | BREW Application Resource Header File |
| browser | ASP.NET Browser Definition |
| brs | Batchrun Batch |
| brx | BREW Application Resource File |
| bs2 | BASIC Stamp 2 Code |
| bsave | QuickBasic BLOAD/BSAVE Data |
| bsc | Visual Studio Browser Information |
| bsf | Altera Quartus II Block Symbol File |
| bsh | BeanShell Script |
| bsp | PBASIC Preprocessor Input |
| bspace | Amazon Lumberyard Blend Space Data |
| bsv | Bluespec System Verilog Data |
| bsx | PBASIC Preprocessor Output |
| bt | Crestron SIMPL Boot Data |
| bte | BTEWin Script |
| btf | Psion OPL Batch File |
| btl | INPRISE Format Language Library |
| btq | Basic Teradata Query Script |
| build | NAnt Build Tool Data |
| buildpath | Eclipse IDE Build Path Data |
