| bur | BuRg3r Source Code |
| bwx | HP BridgeWorks Data |
| bxb | BasicX Compiled Bytecode |
| bxl | Turbo-Basic XL Source Code |
| bxm | BasicX Variables Map |
| bytes | Unity Binary Text Asset Data |
| bzl | Bazel Extension |
| bzr | Bazaar Data |
| c | AutoCAD Development System C Source Code |
| C Source Code |
| Lite-C Script |
| Origin C Source Code |
| c# | Visual C# Source Code |
| c++ | C++ Source Code |
| c-- | Sphinx C-- Language Source Code |
| c3b | Cocos2d-x 3D Model Data |
| c86 | Computer Innovation C86 Source Code |
| ca | Core Animation Markup Language Data |
| ca1 | Delphi Install Disk Data |
| ca2 | Delphi Install Disk Data |
| ca3 | Delphi Install Disk Data |
| ca4 | Delphi Install Disk Data |
| ca5 | Delphi Install Disk Data |
| caf | Amazon Lumberyard Character Animation Data |
| CryENGINE Character Animation Data |
| cal | Cakewalk Application Language Script |
| caml | Core Animation Markup Language Data |
| capfile | Ruby Capistrano Instruction Data |
| car | BREW MP Component Application Resource |
| cas | Borland Combined C/Assembly Source Code |
| catscript | CATIA Script |
| catvbs | CATIA VB Script |
| cax | Amazon Lumberyard CAD Exchange Data |
| cb | BRIEF Macro File |
| CoolBasic Source Code |
| cba | Creative BASIC Source Code |
| CryENGINE Resource Compiler Settings Data |
| cbk | Delphi Temporary Backup |
| cbo | COMBAS Binary Object |
| cbs | Cardbox Macro Script |
| cbxml | CodeBox Library |
| cc | C++ Source Code |
| Visual dBASE Custom Class Data |
| ccb | CopperCube Scene File |
| Visual Basic Animated Button Configuration |
| ccbi | CocosBuilder Export File |
| ccbjs | CopperCube JavaScript File |
| ccc | Dev-C++ Code Completion Cache |
| ccdoc | IBM Rational ClearCase Doctor Data |
| ccg | GNOME C++ Source Code |
| cch | .NET Security Cache |
| ccn | Multimedia Fusion Compressed Data |
| cco | Apple Cocoa Data |
| CodeCheck Object File |
| ccp | CodeCharge Studio Page |
| CopperCube Prefab Data |
| ccproj | Microsoft Azure Project |
| ccs | Visual CCScript Script |
| ccscc | ClearCase Source Control Info |
| ccx | Click and Create Extension |
| ccxml | CCXML Document |
| TI Code Composer Studio Target Configuration |
| cd | Visual Studio Class Diagram |
| cdb | Borland Turbo C Main Database |
| µVision Device Database |
| cdf | Amazon Lumberyard Character Definition Data |
| cdm | Visual dBASE Customer Data Module |
| cdml | Claris Dynamic Markup Language Document |
| cdp | CA Visual Objects Platform Data |
| cdt | ProWorx NXT Temporary Long Comment Data |
| cdx | Alpha Five Table Index |
| cec | Windows CE Catalog Item |
| cel | CIMFast Event Language Source Code |
| cem | Windows CE Emulator Image |
| cer | Lahey Fortran Compilation Error Data |
| cesf | Ultra TC Editors Script |
| cet | Hitachi COBOL2002 Data |
| cetool | Windows CE Plugin |
| cfb | INMOS Toolset Binary Configuration Data |
| Microsoft Compound File Binary |
