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    C C/C++main Source Code File Format
    C# Microsoft Visual C#
    C++ C++ Source Code
    C-- Sphinx C-- Language Source Code
    C-MAP C-map
    C00 Split Multi-volume ACE Compressed File Archive
    C01 Split Multi-volume ACE Compressed File Archive
    C02 Split Multi-volume ACE Compressed File Archive
    C03 Split Multi-volume ACE Compressed File Archive
    C04 Split Multi-volume ACE Compressed File Archive
    C05 Split Multi-volume ACE Compressed File Archive
    C06 Split Multi-volume ACE Compressed File Archive
    C07 Split Multi-volume ACE Compressed File Archive
    C08 Split Multi-volume ACE Compressed File Archive
    C09 Split Multi-volume ACE Compressed File Archive
    C1 Pov-Ray For Windows 3.x Scenes Advanced Newltpot
    C10 Split Multi-volume ACE Compressed File Archive
    C11 CARE-S InfoWorks User Defined Pollutant Detail
    C16 C16 Creatures 3/Docking Station Image
    C18 Dassault Systemes Catia V4 Sequential
    C1S Photo Cache
    C2 Pov-Ray For Windows 3.x Scenes Advanced Newltpot
    C21 CARE-S InfoWorks Defined Pollutant Detail
    C24 Drive Image Ace
    C2C CopyToDVD Project
    C2D WinOnCD Image Format
    C2E Chinese Dictionary Index
    C2K Microsoft Project Holidays
    C2R Microsoft Windows Media Center Click-to-record Format
    C2U Texas Instruments CBL 2 Format
    C2V WellSight Systems License Information
    C2W WaterCAD
    C2X WinOnCD
    C3 Pov-Ray For Windows 3.1 Scenes Advanced Newltpot
    C32 Split Multi-volume ACE Compressed File Archive
    C39 Split Multi-volume ACE Compressed File Archive
    C3D Coordinate 3D Format
    C3D1 Chem3D Cartesian 1 Chemical Modeller
    C3D2 Chem3D Cartesian 2 Chemical Modeller
    C3E CYPE Related
    C3T Chemical Template
    C3XML Chem3D XML Format
    C3Z OpenQwaq 3D Model Format
    C4 JEDMICS Bitmap Image Format
    C40 Split Multi-volume ACE Compressed File Archive
    C41 Split Multi-volume ACE Compressed File Archive
    C42 Split Multi-volume ACE Compressed File Archive
    C43 Split Multi-volume ACE Compressed File Archive
    C44 Split Multi-volume ACE Compressed File Archive
    C45 Split Multi-volume ACE Compressed File Archive
    C46 Split Multi-volume ACE Compressed File Archive
    C47 Split Multi-volume ACE Compressed File Archive
    C48 Split Multi-volume ACE Compressed File Archive
    C49 Split Multi-volume ACE Compressed File Archive
    C4D CINEMA 4D File Format
    C4DUPDATE Cinema 4D Update
    C4F Clonk Game Round
    C4G Clonk Game System
    C4K Clonk Key Format
    C4P CrossOver Software Installer Format
    C4S Clonk Game Scenario
    C4U OpenClonk Update System
    C4V Clonk Game Video
    C50 Split Multi-volume ACE Compressed File Archive
    C51 Split Multi-volume ACE Compressed File Archive
    C52 Split Multi-volume ACE Compressed File Archive
    C53 Split Multi-volume ACE Compressed File Archive
    C54 Split Multi-volume ACE Compressed File Archive
    C55 Split Multi-volume ACE Compressed File Archive
    C6 Organic 2D/3D Drafting & 3D Modelling
    C64 Commodore 64 ROM Image
    C85 RISC OS JPEG Bitmap Image
    CA Telnet Server Initial Cache Data Format
    CA1 Delphi Install Disk
    CA2 Delphi Install Disk12
    CA4 Delphi Installation
    CA5 Delphi Installation
    CAA CleanApp Archive Format
    CAB Windows Cabinet Compressed Archive
    CABAL Haskell Cabal
    CAC DBASE IV Executable
    CACHE Generally Cache Format
    CACHE-2 VLC Media Player Font Cache
    CACHE-3 VLC Media Player Font Cache
    CACHE2 Pro/ENGINEER
    CACTION Apple Mac OS X Automator Conversion Action Format
    CAD CAD Drawing Format
    CADC Corpatla Baudadministration Data Format
    CADRG Compressed ARC Raster Graphic
    CAE Abaqus CAE Model
    CAF Apple Core Audio Format
    CAFF Apple Core Audio Format
    CAG Microsoft Clip Gallery Catalog Format
    CAH Ulead Photo Explorer Thumbnail Cache
    CAI SeeYou Flight Data
    CAJ China Academic Journals Full-text Database
    CAKEWALKWINDOWLAYOUT Cakewalk Window Layout
    CAL CALS Raster Image Format
    CALB Coolect Album Format
    CALIBRE Calibre Device Data Format
    CALIBZ Chief Architect Symbol
    CALS CALS Raster Group 1 Image Format
    CALX Calendar Printing Assistant Template
    CAM Casio QV Digital CAMera Image Format
    CAMM Espresso Mind Map Mind Map Format
    CAMP WCS CAMP
    CAMPROJ Camtasia Studio Project Format
    CAMREC Camtasia Studio Recorder Format
    CAMTHTR Camtasia Studio Theater
    CAMV Camtasia Screencast Video Format
    CAN Canon Navigator Fax Format
    CANF CanOpener
    CANIM Shank Game
    CANNEDSEARCH Apple Mac OS X Finder Predefined Search
    CAOS CanOpener Preference
    CAP PacketView Pro Packet Trace Data Format
    CAPFILE Ruby Capistrano Instruction
    CAPROJ Construct Game Project Format
    CAPS CaptureSaver
    CAPX Construct Game Project Archive Format
    CAR Biosym Chemical Modeller Input Format
    CARB Apple Mac OS X Carbon Package
    CARC Nintendo DS Compressed Archive Format
    CARD Funkiball Adventure
    CARO Adobe Acrobat Creatorcode
    CAS Autodesk AutoCAD License Format
    CASCII CACTVS Chemical ASCII Format
    CASE SlipCover For Mac Template Format
    CAT Microsoft Security Catalog Format
    CAT4D Cinema 4D Catalog
    CATALOG CATIA Catalog
    CATANALYSIS CATIA Analysis
    CATDRAWING CATIA Drawing
    CATFCT CATIA CATfct
    CATKNOWLEDGE CATIA CATKnowledge
    CATMATERIAL CATIA CATMaterial
    CATOM Chief Architect Catalogue
    CATPART CATIA Part Format
    CATPREFERENCES CATIA Preferences
    CATPROCESS CATIA Process
    CATPRODUCT CATIA Product Format
    CATRASTER CATIA Raster
    CATRESOURCE CATIA Resource
    CATSETTINGS CATIA Settings
    CATSHAPE CATIA Shape
    CATSWL CATIA CATSwl
    CATSYSTEM CATIA Functional Systems
    CAV Comodo Virus Definitions Format
    CAWR Espresso Workreport Format
    CAX VCollab 3D Model
    CB Microsoft Clean Boot
    CB1 CARE-S InfoWorks Biochemical Oxygen Detail
    CB4 Actuate Analytics
    CB7 CDisplay 7-Zip Comic Book Format
    CBA CDisplay ACE Comic Book Format
    CBB ChessBase Search Booster
    CBC Comic Book Collection
    CBCP CodeBaby Production Studio Character Package
    CBD Corel WordPerfect Dictionary
    CBDS Comic Book DS Format
    CBF ChessBase Game Information Format
    CBG CyberGauge Data Format
    CBH ChessBase Chess Database Format
    CBK Backup Configuration Format
    CBL Cobol Language Source Code Format
    CBM Bitmap Image Format
    CBMV Comic Book Millennium Collection
    CBN PaperMaster Cabinet
    CBO Microsoft Interactive Training
    CBP Code::Blocks Project Format
    CBPLUGIN Code::Blocks Plugin
    CBPROJ C++ Builder Project
    CBQ StarOS Script
    CBR Comic Book Archive Format Or ComicBook Reader Format
    CBS Comodo Backup Script Format
    CBT CDisplay TAR Comic Book Format
    CBU Comodo Backup Backup Format
    CBV ChessBase Archive Format
    CBW ComicRack Webcomics
    CBX Rational XDE
    CBXML CodeBox XML Library
    CBZ Comic Book Archive Format Or ComicBook Reader Format
    CC C++ Language Source Code Format
    CC1 Briggs Softworks Calendar Commander
    CCA CC: MAil Data Format
    CCB Visual Basic Animated Button Configuration
    CCBJS CopperCube JavaScript Scene
    CCC Microsoft Internet Chat Conversation Log
    CCD CloneCD Track Description Format
    CCE Calendar Creator 2 Event
    CCF CryptLoad Container Format
    CCGAME Microsoft XNA Game Studio Game Package Format
    CCH Photomodeler Photochip Thumbnail Format
    CCIP Curse Client 4 Addon Download Protocol Format
    CCJ Crossword Compiler Compiled Crossword Applet
    CCK Corel Clipart
    CCL CCTools Levelset
    CCM Multimedia Fusion Custom Menu
    CCN Multimedia Fusion Development Format
    CCO Apple Cocoa
    CCP CloneCD Profiles Format
    CCR HealthFrame ASTM Continuity Of Care Record Format
    CCRF Calcomp Raster Bitmap Image
    CCS TrialDirector Clip Script Format
    CCSCC ClearCase Source Control Info Format
    CCT Macromedia (Adobe) Director Shockwave Cast Format
    CCW Crossword Compiler Saved Puzzle
    CCWSLN Connected Components Workbench
    CCX Click & Create Extension
    CCXML Call Control EXtensible Markup Language
    CD ClassDiagram Format
    CD2 DATAIR Cafeteria Document System Custom Text
    CD5 Chasys Draw Image
    CDA CD Audio Track
    CDATA Command & Conquer 3 Audio
    CDB Windows Mobile Pocket Access Database Format
    CDC Autodesk AutoCAD DesignCenter Preview Cache Format
    CDD ConceptDraw Drawing Diagram Format
    CDDA Apple ITunes AIFF Audio Format
    CDDX Circuit Diagram Diagram Format
    CDE CADKEY Dynamic Extension
    CDEM CompeGPS Land Landscape
    CDF Cyberspace Description Format
    CDF-MS ClickOnce Deployment Binary Manifest Format
    CDFX Cindex
    CDG DART Karaoke Studio Lyrics Format
    CDI DiscJuggler Image Format
    CDJ DiscJuggler CD-ROM Data
    CDK Calamus SL Document
    CDL CADKey CAD Language Format
    CDLX Adobe Audition Audio CD Project Format
    CDM NTI CD&DVD-Maker Image Format
    CDMEDIA Boxer For Mac Cd-rom
    CDMM ConceptDraw MINDMAP Document
    CDMP WCS CDMP
    CDMT ConceptDraw MINDMAP Template
    CDMTZ Compressed ConceptDraw MINDMAP Template
    CDMZ ConceptDraw MINDMAP Compressed Document Format
    CDO Crescendo Music Score Format
    CDOC DigiDoc Client Container
    CDP Trainz Simulator Content Dispatcher Pack Format
    CDP2 Trainz Classics Content Dispatcher Pack 2 Format
    CDPX ConceptDraw PROJECT XML Format
    CDPZ ConceptDraw PROJECT Document
    CDR CorelDRAW Vector Or Bitmap Format
    CDR3 CorelDRAW 3 For Mac Vector Or Bitmap Image
    CDR4 CorelDRAW 4 For Mac Vector Or Bitmap Image
    CDR5 CorelDRAW 5 For Mac Vector Or Bitmap Image
    CDR6 CorelDRAW 6 For Mac Vector Or Bitmap Image
    CDRW CorelDRAW For Mac
    CDRX Bosch Crash Data Retrieval Data Format
    CDRZIP DICOM Compressed Image
    CDS ChemDraw Stationery Document
    CDSG DrawMusic Chord Song
    CDT CorelDRAW Template Format
    CDT6 CorelDRAW 6 For Mac Template
    CDT_ CorelDRAW For Mac Template
    CDU CDU Paint Image Format
    CDV CatDV Catalog
    CDW KOMPAS CAD Drawing Format
    CDX CorelDRAW Compressed Drawing Format
    CDXML ChemDraw XML Format
    CDZ ROM With A View Project Format
    CE Digital Vision ComputerEyes IFF Bitmap Format
    CE0 Winewar Worm
    CE1 Computer Eyes Raw Image Format
    CE2 Computer Eyes Raw Image Format
    CEA DAZ 3D Carrara Pro Export
    CEB Apabi EBook Format
    CED JVC Corrupted Video Format
    CEDATA Pogoplug
    CEDPRJ Ashampoo CoverEditor Cover Project Format
    CEF CenturionMail Format
    CEI CRiSP Harvest
    CEIMG CeRegEditor Registry Image
    CEL Lumena CEL Bitmap Image Format
    CELL CASTEP Supercell Material Data
    CELTX Celtx Project Format
    CELX Celestia Script
    CEM Empire Earth Game Format
    CEO Winewar Worm
    CER Internet Security Certificate
    CERT Netscape Certificate Index
    CERTAUTHORITYCONFIG Apple Mac OS X Certificate Assistant Configuration
    CERTSIGNINGREQUEST Apple Mac OS X Certificate Assistant
    CET Hitachi Cobol
    CETRAINER DBVM
    CEX SolidWorks Enterprise PDM Vault Export Format
    CF Sendmail Configuration Format
    CF2 Common File Format 2
    CF5 DocuWare
    CF7 Toshiba ConfigFree Profile Handling Module
    CFA Adobe Premiere Pro Audio Format
    CFB Disk Drill Recovered
    CFC Adobe ColdFusion Component Format
    CFD CryptoForge Document
    CFDI Comprobante Fiscal Digital Por Internet
    CFE CryptoForge Encrypted
    CFF ColorImpact Color Formula Format
    CFF2 Kodak Pandora Exported
    CFG Configuration Files
    CFGE Jewel Quest Configuration Format
    CFI CleverForm Script
    CFK Microsoft Developer Studio Diagram
    CFL IMVU Product Format
    CFM Adobe ColdFusion Template Format
    CFML Adobe ColdFusion Markup Language Format
    CFN Calamus Font Data
    CFO Turbo C Utilities C Form Object
    CFP Bitmap Native Format For CoverFactory
    CFPRESET SA Color Finesse Plugin For Adobe After Effects
    CFR Cross Fire Replay Format
    CFREPLAY Crossfire Europe Replay
    CFS INMOS Configuration Format
    CFT CFast Graphics
    CFW ChemFinder Form
    CFX Magix Movie Edit Pro
    CFXR Cocoa Sfxr Format
    CFXXE Possibly Malware
    CFZ Compressed Archive
    CG NVidia CgFX Format
    CG3 Cabri 3D Document
    CG4 CALS Group IV Bitmap Graphics
    CGA Ventura Publisher CGA Display Font
    CGD CricketGraph Data
    CGDB Microsoft Clip Art Package
    CGF Asm Objasm Format
    CGFX CgFX Shader Format
    CGI Common Gateway Interface Script Format
    CGINC Unity Custom Shader Include
    CGK BlueSoleil
    CGM Computer Graphics Metafile
    CGMAP CityGuide Region Map
    CGO Railroad Tycoon 3 Car Properties
    CGP PixelCryptor Encrypted Format
    CGR CATIA MultiCAx Plug-in Conversion Format
    CGRP Pro Tools Clip Group Format
    CGT Gold Parsing System Compiled Grammar Table
    CGVP NVidia Cg Programming Language XML
    CGX ARM RL-TCPnet HTTP Web Server XML Web Page Update Script
    CGZ AssaultCube Map Format
    CH OS/2 Configuration
    CH1 IBM Freelance Graphics Chart
    CH10 Irig 106 Original Recording
    CH3 Harvard Graphics V3.0 Chart/image Format
    CH4 WSxM
    CH5 VisIt
    CHA Online Chat Configuration Format
    CHAM Compiled HAM Format
    CHAP MP4 Movie Chapter
    CHARMM CHARMm Chemical Modeller Input
    CHARSET Character Set Format
    CHART Feedback Chart Format
    CHAT Online Chat Configuration Format
    CHATLOG Adium Chat Log
    CHC HCFR Colorimeter Data Format
    CHD MAME Compressed Hard Disk Format
    CHE CHwinEHE Project
    CHEF Chef Source Code Format
    CHESSTITANSSAVE-MS Chess Titans Save Game Format
    CHF PcAnywhere Remote Control
    CHG Quicken Online Data Format
    CHH C++ Header
    CHI Microsoft Help Index
    CHJ IBM SPSS Interview Cache
    CHK ScanDisk File Fragment
    CHKN IMVU Create Mode Temporary
    CHKSPLIT Incredible Bee Archiver Checksum
    CHL Microsoft Internet Explorer Channel Information Format
    CHM Microsoft Compiled HTML Help Format
    CHML Chameleon Encrypted Format
    CHN Ethnograph Data Format
    CHO Animation:Master Choreography
    CHORD Song Chords Format
    CHP Ventura Publisher Chapter Document
    CHQ Microsoft Help Combined Full-text Search
    CHR Borland Language Stroke Font Format
    CHRPARAMS CryENGINE Character Paramters Format
    CHS Windows Chinese Noise-Word List Format
    CHT ZSNES Cheat Code Format
    CHTML Compact HTML Document
    CHUNK001 File Splitter Split File (part 1)
    CHV ChView Star Map Format
    CHW Microsoft Help HTML Help General Index Format
    CHX Autodesk AutoCAD Standards Check Format
    CI CitectSCADA Format
    CID CoDiagnostiX User Defined Implant
    CIDB Apple ITunes CD Information Format
    CIF Easy CD Creator CD Image Format
    CII Caesar II
    CIK Corel Graphics 10 Custom Dual Tone
    CIL Microsoft Office Clip Gallery Download Package
    CIM CimPack Design Drawing
    CIMG CImg Image Format
    CIN Kodak Cineon Image Format
    CIN96LM Microsoft Cinemania
    CIN96UPD Microsoft Cinemania Format
    CINE Vision Research Phantom Cine Camera Video Format
    CINEMA4D Cinema 4D For Amiga
    CIO SWAT Master Watershed
    CIP CryptoBuddy Encrypted Format
    CIPO Cartesian Products Compressed Internet Document
    CIR Supermax ECAD Command Save
    CIRC Logisim Circuit
    CIRCUIT KTechlab Circuit Design Format
    CIS CheckInbox
    CISO Wii Compressed Game Image
    CIT Intergraph Scanned Image
    CIV Empire Earth Custom Civilization Information
    CIV5MAP Civilization 5 Map
    CIV5SAVE Civilization 5 Saved Game Format
    CIW Web Of Science Export
    CIX Rational XDE
    CJSTYLES Skin Builder Project
    CK1 Commander Keen 1 Game Data
    CK2 Commander Keen 2 Game Data
    CK3 Commander Keen 3 Game Data
    CK4 Commander Keen 4 Game Data
    CK5 Commander Keen 5 Game Data
    CK6 Commander Keen 6 Game Data
    CKA Comfort Keys Database
    CKB Cricket Audio Sound Bank Format
    CKBX Cricket Audio XML Bank Description Format
    CKD CADKEY Design Format
    CKF Casio Keyboard Audio Format
    CKP Ingres Database Checkpoint Data
    CKS Microsoft Windows CE Image Info
    CKT B2 Spice Circuit Design Format
    CKZ QuickSFV File Verification Database
    CL IconUtils Mouse Cursor Library Format
    CL2 HY-TEK Meet Results Format
    CL2ARC Comic Life 2 Document Archive Format
    CL2DOC Comic Life 2 Document Format
    CL2LYT Comic Life 2 Layout Format
    CL2TPL Comic Life 2 Template Format
    CL3 Easy CD Creator CD Layout
    CL4 Easy CD Creator CD Layout Format
    CL5 Easy CD Creator Saved Project Format
    CLA Clarion For DOS Source Code
    CLAF Claris Font
    CLAM Adobe InDesign Dictionary
    CLARIFY Blue Mango Clarify Document Format
    CLAS Java Class
    CLASS Java Bytecode Class Format
    CLASSDIAGRAM Microsoft Visual Studio Class Diagram
    CLASSLIST SMART Notebook Class List Format
    CLASSPATH Eclipse IDE JAVA Project Related
    CLB Super NoteTab ClipBook Template Format
    CLBX MP3 Automagic CD Cover Creator Label
    CLC Microsoft Schedule+ 7 Habits Mission Statement
    CLD Canon CD-Label Print Label Layout Format
    CLDCVT CD-LabelPrint Converted Data
    CLDLYR TerraGen Cloud Layer
    CLE Icon Lock-iT Locked File Indicator
    CLEO Grand Theft Auto Vice City Mod Format
    CLF ListPro
    CLG QIP List Of Ignored Contacts Format
    CLGX Collage Maker Collage
    CLI Client Management System Customer
    CLIPPING Apple Mac OS X Finder
    CLIPS Coda For Mac Clips Format
    CLIX CLIX Command Format
    CLJ Clojure Source Code
    CLK CorelDRAW Corel R.A.V.E. Animation Format
    CLKK Clicker Keyboard Format
    CLKT Clicker Template Format
    CLKW Clicker Word Bank Format
    CLKX Clicker Grid Set Format
    CLL Crick Software Clicker
    CLM Micrografx Picture Publisher Macro Format
    CLN Microsoft Windows 3.x Configuration Backup
    CLO Cloe Ray-Tracer Image
    CLOE Cloe Ray-Tracer Image
    CLOUD GOM Atos Scanner
    CLP Microsoft Windows Clipboard Format
    CLPI Blu-Ray Clip AV Stream Format
    CLPPRJ CodeLobster PHP Edition Project
    CLR Adobe Flash Color Table Format
    CLR0 Nintendo Wii Color Swapping Animation
    CLS JavaScript Class Definition Format
    CLT VisualBoyAdvance Cheat List Format
    CLU Broken Sword 2 Dialogue
    CLV QIP Visible List
    CLW Microsoft Visual C++ MFC Class Wizard Information Format
    CLX Adobe Standard Dictionary Format
    CLY CorelDRAW Custom Layout
    CLZ Tomb Raider: The Angel Of Darkness Game
    CM Grand Theft Auto CLEO Custom Mission Format
    CM10 CaseMap Case Format
    CM2 Poser Camera Set Format
    CM3 CaseMap Data
    CM4 ClipMate Data
    CM5 LexisNexis Case Analysis
    CM8 CaseMap Case
    CMA Applix TM1 Database Format
    CMAKE CMake Module
    CMAP CmapTools Concept Map Format
    CMB Xtree For Windows Button Bar
    CMBL Logger Pro Data Format
    CMC Comic Collector Collection Data
    CMD Microsoft Windows Command Script Format
    CMDB ANSYS CFX Mesh Database
    CMDF CrystalMaker Data
    CMDT Claris Dictionary
    CME Crazy Machines Level Format
    CMF Creative Labs FM-synthesis Music Format
    CMG ChessMaster Saved Game
    CMI The Dig Bundle
    CML Chemical Markup Language Document Format
    CMM Corel Multimedia Manager Album Format
    CMMCD Camtasia Studio MenuMaker Project
    CMMP Camtasia MenuMaker Project
    CMMTHEME CleanMyMac Theme Format
    CMMTPL Camtasia MenuMaker Template
    CMN Systems Management Server (SMS) Update
    CMO Spanish Whiz Sound
    CMOD Celestia Model Format
    CMP PKWare Compression Library Archive Format
    CMPROJ Camtasia For Mac Project Format
    CMP_XML Solid Edge XML Design
    CMR Coach Saved Results
    CMRBK CaseMap ReportBook Definition
    CMREC Camtasia For Mac Record Format
    CMS CaseMap Case Script Format
    CMT Chinon ES-1000 Digital Camera Image Format
    CMTX E-Sword Commentary
    CMU CMU Window Manager Bitmap Image
    CMV CorelDRAW CorelMove Animation
    CMW Microsoft Office Custom Maintenance Wizard Data
    CMX Corel Presentation Exchange Format
    CMY CorelDraw Custom
    CMZ Poser Compressed Camera Set Format
    CN CNwin/MLwin Account
    CN1 CNR Modem Initialization Data Format
    CN3 CN3D
    CNA Catena Project Format
    CNB Pegasus Mail Noticeboard Mail Stored Message
    CNC CNC Machine Tool Path Format
    CNC3CAMPAIGN Command And Conquer 3 Campaign Save Game
    CND Melco Condensed Embroidery Format
    CNDX Avery DesignPro For Mac Label Format
    CNF Network Configuration Format
    CNG CryptoNG Encrypted Format
    CNI CWBench
    CNK Microsoft Dynamics GP Chunk
    CNM NoteMap Outline Format
    CNN ADO-network Connection Configuration
    CNO INet-Server Error Description
    CNQ WebShop Platinum Project
    CNR Pegasus Mail Mail Message Stored In Systemwide Folder
    CNS Windows 2000 Client Connection Manager Export Format
    CNT Help Contents Format
    CNTK Microsoft Outlook Express Contact
    CNTL GoCart Control
    CNV Canvas Drawing Format
    CNX Pegasus Mail
    CO Cobalt 3D
    COA Caligari TrueSpace 3D Object
    COB COBOL Programming Language Source Format
    COC Bibexcel
    COD Blackberry Compiled Java Code
    CODAPLUGIN Coda For Mac Plugin Format
    CODASITE Coda For Mac Web Project Format
    COE Xilinx BRAM Initialization
    COF AutoDesk Data Format
    COFFEE CoffeeScript Script Format
    COK INet-Server Error Report
    COL Autodesk Colour Palette
    COLLECTION Adobe Bridge Collection Format
    COLLISIONMESH Battlefield Collision Mesh
    COLLOQUYTRANSCRIPT Colloquy Chat Transcript
    COLOR Amaya Config
    COLORPICKER Apple Mac OS X Color Picker Component
    COLORS SAM Makelogo Color
    COLOURSCHEME J&ASoft Speedy Browser Color Scheme Settings
    COLR Kaleidoscope Scheme
    COLZ Adobe Collage Moodboard Format
    COM Command Executable Format
    COMFYCAKESSAVE-MS Comfy Cakes Saved Game Format
    COMICDOC Comic Life Document Format
    COMMAND Apple Mac OS X Terminal Format
    COMMANDERDOC Apple Qmaster
    COMMON Unix Script
    COMP CodeWarrior Compiler
    COMPARISON Merge Comparison Report
    COMPLETE SendSafe Deciphered E-message
    COMPO DAZ 3D Carrara Pro 7 Or 8 Temporary
    COMPONENT Mac OS X System Component
    COMPONENTDIAGRAM Microsoft Visual Studio Component Diagram
    COMPONENTS Mac OS X System
    COMPOSITEFONT Composite Font Format
    COMPOSITIONMODEL Invantive Composition Data Model
    COMPRESS Microsoft Compress
    COMPRESSED WordCompress Compacted Web Format
    CON Corel WordPerfect Concordance Format
    CONF Configuration Information Format
    CONFIG Configuration Format
    CONFIGPROFILE Apple Configuration Profile
    CONFIGURE Bash
    CONFLUENCE Eclipse Mylyn WikiText Confluence
    CONFORM Conformalizer Change List Format
    CONSOLE Widows NT Console
    CONT Panasonic Camcorder Extra
    CONTACT Microsoft Windows Contact Format
    CONTENTPROJ XNA Game Studio Game Content Project
    CONTENTS MAC OS X
    CONTENTSOFCLIPBOARD WinXP Powertoy
    CONTOUR Contour Screenplay Format
    CONTROLS OpenBVE Keyboard Settings Format
    CONVERTERX SiMX TextConverter Project
    COO AutoCAD Bounding Coordinates Cookie
    COOK Netscape For Mac Cookie
    COOL QB - Text Analyzer Vocabulary List
    COORDS Ribbons Coords
    COP Sam Coupé Sound
    COPRESET Capture One Preset Format
    COPY Sony Ericsson Protected Content Format
    COR CorelDRAW Format
    COS Creatures Source Code Format
    COS2 Pinnacle Studio Cache Format
    COSTYLE Capture One Style Format
    COUNTER Netobjects Fusion Components Bbscomp Message
    COV Microsoft Cover Page Editor Fax Cover Page Format
    COVERAGE Microsoft Visual Studio Code Coverage
    COVERAGEXML Microsoft Visual Studio Code Coverage
    COW Thief Game
    COX Click & Create Extension
    CP Xcode C++ Source Code Format
    CP1 CARE-S InfoWorks Phosphorus Detail
    CP2 ChessBase Theme Classification
    CP3 Grand Prix 3 Cockpit Shape Format
    CP8 CP8 256 Gray Scale Image
    CP9 ChoicePoint Encrypted Format
    CP? LoseThos C+ Source
    CPA Adobe Premiere Conformed Audio Format
    CPB Comicino Studio Project Format
    CPBITMAP Apple IPhone Bitmap Wallpaper Format
    CPC Cartesian Perceptual Compression Compressed Image
    CPCT Compact Pro Archive
    CPD CorelDRAW Corel PrintOffice Drawing Format
    CPDT Adobe Captivate Design Template
    CPE Win95 Cover Page Editor Fax Cover Sheet Format
    CPF Cognos Project Format
    CPG Manga Studio Drawing
    CPGZ Compressed UNIX CPIO Archive
    CPH Corel Print House Printing Project Format
    CPI AVCHD Clip Information Format
    CPIO Unix CPIO Archive Format
    CPK DTM Test Log Format
    CPL Microsoft Windows Control Panel Format
    CPMZ Miradi Project Format
    CPN Age Of Empires Campaign Format
    CPO Corel Print House Data
    CPP C++ Main Source Code File Format
    CPQ Compaq OEM Disc Configuration Format
    CPR Cubase Project Format
    CPRR Adobe Captivate XML Script
    CPS Corel Photo House Image Format
    CPT Corel PHOTO-PAINT Bitmap Format
    CPT2 M-Tron Pro Library
    CPTL Adobe Captivate Project Template Format
    CPTM Adobe Captivate Theme
    CPTX Adobe Captivate Project Format
    CPU SiSoftware Sandra
    CPX Oracle Application Development Framework ADF Binding Context Format
    CPY ECopy Desktop Scanned Document Format
    CPZ LoseThos C+ Source
    CQL XDCC Catcher Queue List
    CQT MAIL.DAT Container Quantity Data
    CR CRiSP Source Code
    CR1 LoggerNet CRBasic Source
    CR2 Canon Digital Camera RAW Image Format Version 2.0
    CR5 Survey Pro Coordinate
    CRAFT KSP Spacecraft Format
    CRASH Apple Mac OS X Console Report Format
    CRASHED AbiWord Crash-saved Document Format
    CRB BigOven Recipe Database
    CRC Total Commander CRC Format
    CRD Microsoft Windows Cardfile Database Format
    CRDOWNLOAD Google Chrome Incomplete Download Format
    CRDS Microsoft Windows CardSpace Backup Format
    CREC Microsoft Lync 2010 Recording
    CREOLE Creole Source
    CREV Adobe Captivate Review Format
    CRF Enhanced Dark Engine Game Archive Format
    CRG Calamus Picture Image
    CRH EN-CC Truss Geometry
    CRI Crystal Reports
    CRL Certificate Revocation List
    CRMLOG Microsoft Windows CRM Log
    CRP CorelDRAW Corel Presents Run-time Presentation
    CRS Corel WordPerfect Conversion Resource Format
    CRS3 OmniPage Lite
    CRT Internet Security Certificate
    CRTR MultiAd Creator Pro Document Format
    CRTX Microsoft Office 2007 Chart Template Format
    CRV CorelDRAW Corel PHOTO-PAINT 10 Custom Gradients Format
    CRW Canon Digital Camera RAW Image Format
    CRWL Microsoft Windows Crawl Format
    CRX Google Chrome Extension Installer File Format
    CRY CryENGINE Map Format
    CRYPT WhatsApp Messenger Encrypted Message Database Backup
    CRYPT5 WhatsApp Messenger Encrypted Message Database Backup
    CRYPT6 WhatsApp Messenger Encrypted Message Database Backup
    CRYPT7 WhatsApp Messenger Encrypted Message Database Backup
    CRYPTED Ashampoo WinOptimizer Encrypted Format
    CRYPTOMITE CryptoMite Encrypted Archive
    CRYPTRA Cryptra Encrypted Format
    CRYSISJMSF Crysis Saved Game Format
    CRYSISPSF Crysis Warhead Saved Game Position Format
    CRZ Compressed Poser Character Rigging Format
    CS Microsoft Visual Studio Visual C#.NET Source Format
    CS1 Sinar CaptureShop
    CS2 CyberStep2
    CS4 Sinar CaptureShop 4-shot Image
    CS8 Unix Graphics Format
    CSA Agilent PNA Code Calset Format
    CSAC Web Research Collection Optimization Temporary
    CSAPLAN SPSS Analysis Plan Format
    CSASSEMBLY ICQ 6
    CSATTR Microsoft Visual Studio Attractor
    CSB Corel PHOTO-PAINT Script
    CSC 18 Wheels Of Steel: Pedal To The Metal Game
    CSCPKT Sample Packet
    CSD Compact Shared Document
    CSDPROJ C# Device Project
    CSE Web Research Document Package
    CSF Adobe Photoshop Color Settings Format
    CSGRAD Microsoft Visual Studio Gradients
    CSH Adobe Photoshop Shapes Format
    CSHRC UNIX Command
    CSHTML ASP.Net Web Page
    CSI ContentServ CS EMMS Suite Include Format
    CSJ RIM CSJ Registration
    CSK Claris Works
    CSKIN CD Art Display Skin Format
    CSL CineStyle Color Settings Format
    CSM 3ds Max Character Studio Maker Format
    CSMANIFEST ICQ 6 Settings
    CSML Chemical Style Markup Language
    CSN Adobe Dreamweaver Snippet Format
    CSO CISO Compressed ISO Format
    CSOM Eudora For Mac
    CSP CorelDRAW Service Bureau Profiler Format
    CSPLAN SPSS Sampling Plan Format
    CSPROJ Microsoft Visual Studio Visual C# Project Format
    CSQ Microsoft FoxPro Queries
    CSR Certificate Signing Request Format
    CSS Cascading Style Sheets Format
    CSS1 Cascading Style Sheet
    CSSTORE Apple Mac OS X Cache
    CST Commonspace Document Format
    CSV Comma Separated Value Format
    CSVIEW Microsoft Visual Studio Views
    CSVX XML CSV
    CSW Corel WordPerfect Setup Information
    CSX Microsoft Visual C# Primary Script Format
    CSY Canvas Symbol Library Format
    CSZ The Core Media Player Skin
    CT IRIS CT Image Format
    CT0 Tajima TBF Condition
    CT1 SMS Proposed Site Control
    CT7 CaseMap Case Analysis Template
    CT8 CaseMap Case Template
    CTA ColorTouch Assistant Settings
    CTB AutoCAD Colour-dependent Plot Style Table Format
    CTBL Xamine NSCL
    CTBODYFITTING CrazyTalk Animator Format
    CTC SeeYou Flight Data
    CTD Tomahawk Gold Compressed Tomahawk Document
    CTE Classical Text Editor Document
    CTF AVG Antivirus Update Control Format
    CTFSYS OS X Mach Kernel System
    CTG BMC Software PATROL Format
    CTI Collectorz.com Template Info
    CTIT RAR Archive
    CTK TeKton3D Project
    CTL Visual Basic Control File (Active X Control File)
    CTM Crazy Talk Face Model Format
    CTMDPI MRMC Markov Reward Model Checker Matrix
    CTN Cadterns Sloper Format
    CTO Microsoft Visual Studio Binary Command Table Output
    CTP CakePHP Template Format
    CTPROJECT CrazyTalk Animator Project
    CTR BrainVoyager QX Contrast
    CTS CrazyTalk Audio Format
    CTSYM Microsoft Visual Studio Command Table Output
    CTT Windows Live Messenger Contact List Format
    CTV Citavi Project Format
    CTV3 Citavi 3 Project Format
    CTX Microsoft Windows Terminal Server INI Backup Format
    CTXT BlueJ Information Format
    CTY SimCity City Format
    CTZ Custody Toolbox Compressed Backup
    CU CUDA Source Code Format
    CU1 Photoline 4 Curve
    CU3 Photoline Curves Clut
    CU? Photoline Clut
    CUB Windows Installer Validation Module Format
    CUBE Antaeus
    CUE Cue Sheet Description Format
    CUF Turbo C Utilities Form Definition
    CUI AutoCAD Customization Format
    CUIX Autodesk AutoCAD Custom User Interface Format
    CUL IconForge ImageForge Cursor Library
    CUP SeeYou Waypoint
    CUR Windows Cursor Format
    CURRENT WhatsApp Messenger Encrypted Message Database
    CURSEMOD Curse Client Mod
    CURSOR Sun Cursor
    CURSORFX CursorFX Cursor Theme Format
    CURXPTHEME CursorFX Theme Format
    CUS AutoCAD Custom Dictionary Format
    CUST QuarkXPress Mac File Type
    CUSTOMDESTINATIONS-MS Microsoft Windows 7 Jump List
    CUT Dr. Halo Bitmap Format
    CUTECUTPROJECT Cute Cut Project
    CUV Origin Sample Curve
    CU_ Microsoft Windows Winhelp Compressed
    CV Microsoft CodeView Information Screen
    CV5 Canvas 5 Drawing Format
    CVA HP Compaq Diagnostics Format
    CVC CVideo Format
    CVD Clam AntiVirus Database Format
    CVF CPU-Z Validation Format
    CVG Calamus Vector Image File Format
    CVI CassiniVision Map Image Format
    CVM Odin Sphere
    CVN Sonic CineVision Encoding Session Format
    CVP Portrait Image Format
    CVR Microsoft Office Crash Report Format
    CVS CVS And VMS Sound Files (continous Variable Slope)
    CVSIGNORE Eclipse CVS Settings
    CVSRC TortoiseCVS CVS Command
    CVT Canvas External Tool Format
    CVW CaseView Document Format
    CVX Canvas Drawing Format
    CVZ Card Vault Inventory
    CW CardWorks Template Format
    CW3 Claris Works Document
    CW7 COMPRESS Related
    CWB Cakewalk Bundle
    CWC CADfix Wizard Configuration
    CWDB ClarisWorks Database
    CWF CorelDRAW Workspace Format
    CWGR ClarisWorks Drawing
    CWIE CodeWarrior
    CWK ClarisWorks Document Format
    CWKS ClarisWorks
    CWL ClarisWorks Library
    CWLINK CodeWarrior
    CWM WebSphere Map Designer Express Map Definition
    CWMS CompeGPS Land Remote Map
    CWP Cakewalk Sonar Audio Project Format
    CWPT ClarisWorks Painting Drawing
    CWR Crystal Reports Report
    CWS ClarisWorks Template Format
    CWSS ClarisWorks Spreadsheet
    CWT ClarisWorks Texture Format
    CWW Crossword Weaver Format
    CWWP ClarisWorks Document
    CWX Sonar Track Template
    CWZ Circuit Wizard Format
    CW_ CorelDRAW Workspace
    CX CodeMapper Script
    CX3 CMS Video Format
    CXA ANSYS Fluent Animation Metadata
    CXARCHIVE CrossOver Bottle
    CXB Custody X Change Data
    CXD SimplePCI Graphics Data Format
    CXE Common XML Envelope
    CXF Google Picasa Collage Format
    CXL Business Integrator Extract Schema
    CXML Microsoft Silverlight Server Side Data
    CXP Omron CX Programmer Format
    CXQ SillyDl.CXQ Downloading Trojan
    CXR CX-Programmer Settings
    CXT Adobe Director Protected Cast Format
    CXV Custody X Change Data
    CXX C++ Main Source Code File Format
    CYA Cyana Macro
    CYBERDUCKLICENSE Cyberduck For Mac OS License Format
    CYBERDUCKPROFILE Cyberduck Connection Profile
    CYI Clustify Input Format
    CYL Ribbons Cylinder
    CYO Clustify Output Format
    CYP Home Designer Pro Project Format
    CYR Crysis Level
    CYS Clustify Summary Statistics Format
    CYW Rbot.CYW Worm Format
    CZ Czech Language Translation
    CZD The Crash Zone Drawing Format
    CZI Carl Zeiss Image Data Format
    CZIP ZG Encrypted Zip Archive
    CZN RMCProfile Atom List
    CZP ClozePro Archive Format
    C_ Microsoft Winhelp Compressed
    C__ C++ Source Code