| cof | MPLAB IDE COF File |
| coffee | CoffeeScript JavaScript File |
| cola | Cola Language Source Code |
| comb | Amazon Lumberyard Blend Space Combination Data |
| comp | CodeWarrior Compiler Data |
| com_ | Emu8086 Assembly Source Code |
| conc | Concurnas Source Code |
| container | Eclipse IDE Project Settings Data |
| cord | Visual Studio Cord Data |
| core | Linux Core Dump Data |
| cos | Scarlett Expert System Compiler Query Data |
| Scilab Binary Diagram |
| cosf | Scilab ASCII Diagram |
| counter | NetObjects Fusion Components Bbscomp Message |
| coverage | Visual Studio Code Coverage Data |
| coveragexml | Visual Studio Code Coverage XML Data |
| cox | Click and Create Extension Object |
| cp | CPIde Source Code |
| Xcode C++ Source Code |
| cpb | CPB Data |
| cpd | WebDev Code Style Data |
| cpdsc | CMSIS Pack Project Description |
| cpf | Cab Provisioning Format |
| ProWorx NXT Comment Pointer Data |
| cphd | CloudChan Pre-processed Hypertext Document |
| cpj | CUDA Project |
| cpk | Novell Netware Compiled Server Software Package |
| WDK Driver Test Manager Log |
| cpl | Concordance Desktop Programming Language Script |
| cplist | GNU Make C Property-list Data |
| cplusplus | C++ Source Code |
| cplz | Crestron SIMPL# Pro Library |
| cpp | Autodesk Maya C++ Plugin Source Code |
| C++ Source Code |
| Xcode C++ Source Code |
| cpr | Transputer Development System Occam Program Code |
| cpt | Concordance Compiled CPT Script |
| cpy | COBOL Include Data |
| cpz | Crestron SIMPL# Pro Program |
| LoseThos C+ Source Code |
| cr | CRiSP Macro File |
| cr1 | CRBasic Source |
| cr2 | CRBasic Source |
| cr3 | CRBasic Source |
| cr4 | CRBasic Source |
| cr5 | CRBasic Source |
| cr6 | CRBasic Source |
| cr7 | CRBasic Source |
| cr8 | CRBasic Source |
| cr9 | CRBasic Source |
| crash | Mac OS X Crash Log |
| crev | Adobe Captivate Commentable SWF |
| crf | MASM Cross-Reference Data |
| µVision Cross-Reference Data |
| crn | Crunch Compressed Texture |
| crp | dBASE IV Encrypted Database |
| Visual dBASE Customer Report Data |
| cryproject | CryENGINE Project |
| cs | CLEO Custom Script |
| Visual C# .NET Class |
| csc | Ovation Pro C Script |
| csdef | Microsoft Azure Service Definition Schema |
| csdl | Conceptual Schema Definition Language Data |
| csgrad | Visual Studio Gradients Data |
| csh | CSH Shell Script |
| cshader | Visual Studio CShader Data |
| csharp | Visual C# Script |
| cshtml | Razor C# Web Page |
| csi | ContentServ CS EMMS Include |
| CR10X EdLog Source Code |
| csig | SCons Content Signature |
| csl | Citation Style Language Document |
| cslog | CodeSite Log |
| csm | C++ Builder Precompiled Header |
| csn | Adobe Dreamweaver Code Snippet Data |
| Dreamweaver Code Snippet File |
| cso | High Level Shader Language Compiled Bytecode |
| csp | CaseWare Working Papers Script Page |
| InterSystems Cache Server Page |
| RadGs Concept Server Page |
