| brl | BRL-CAD Document |
| brl | MicroBraille Document |
| bro | PrintShop Deluxe Brochure |
| brt | Photo Builder Template |
| bry2 | Bryce 2 Scene |
| bst | BibTeX Document Style |
| bt5 | ERP5 Business template |
| btd | Business-in-a-Box Document |
| btxt | BTXTPad Document |
| buz | Buzz Tools BuzzEdit Document |
| bwb | Visual Baler Spreadsheet |
| bwd | BanglaWord Document |
| bwp | BuRg3r Web Page |
| bws | SmartWare Worksheet Backup |
| bxl | Accelerated Designs Binary PCB Library |
| bxu | PictureGear Studio file |
| byd | BYP Layout Document |
| bzabw | AbiWord Bzip2 Compressed Document |
| c1dx | C1Report C1D Open XML Document |
| c2w | Cybernet v2 Document |
| c3d | Chem3D Document |
| cad | Autodesk QuickCAD Document |
| cad | BobCAD-CAM CAD Document |
| cadl | CADKEY CAD Advanced Design Language File |
| cadoc | Clicker App Document |
| cae | Caditor Encrypted Document |
| cal | Broderbund PrintMaster Calendar |
| calca | Calca Document |
| calx | Calendar Printing Assistant Template |
| cap | Capella Music Score |
| capx | Capella XML Music Score |
| capxml | Capella XML Document |
| car | Broderbund PrintMaster Card |
| car | NeoBook Cartoon |
| cas | Comma-Delimited ASCII Text |
| case | SlipCover Case Template |
| cat | TablEdit Chord Catalog |
| catdrawing | Catia Drawing |
| catpart | Catia V5 Part Description Document |
| catproduct | Catia V5 Product Description Document |
| cax | VCollab Pro 3D Model |
| cbb | CyberBuddy Document |
| cbcx | Comic Book Creator Document |
| cbk | National Estimator Costbook |
| cbt | Computer-based Training Document |
| cbtx | Comic Book Creator Template |
| cbtz | Comic Book Creator Template |
| cbw | ComicRack WebComic Document |
| cc5 | Calendar Creator v5 Document |
| cce | Calendar Creator v2 Document |
| cch | CorelDRAW Corel Chart Document |
| ccitt | CCITT Group 3 and Group 4 Encoded Fax |
| cct | Adobe Director Compressed Cast |
| ccz | DxDesigner Compressed PCB Layout |
| cd2 | Click'n Design 3D Document |
| cdb | Pocket Access Document |
| cdc | Canvastic Drawing |
| cdc | Nero Cover Designer Import Document |
| cdd | CADAM Drawing Document |
| cdd | ConceptDraw Pro Drawing |
| cdd | Ovation 1 Document |
| cddx | Circuit Diagram Document |
| cddz | ConceptDraw PRO v10 Document |
| cdk | CADKEY Document |
| cdk | Calamus Document |
| cdl | CaseWare Working Papers Document |
| cdl | Circuit Description Language Data |
| cdl | SignLab Vector Graphics Data |
| cdml | Creately Document Markup Language Document |
| cdmm | ConceptDraw MINDMAP Document |
| cdmt | ConceptDraw MINDMAP Template |
| cdmtz | ConceptDraw Compressed MINDMAP Template |
| cdmz | Compressed ConceptDraw MINDMAP Document |
| cdn | Click'n Design 3D CD Label Document |
| cdo | CADAM Overlay Data |
| cdo | Crescendo Music Notation |
| cdoc | Clicker Document |
| cdpx | ConceptDraw PROJECT XML Document |
| cdpz | ConceptDraw PROJECT Document |
| cdr3 | CorelDraw 3 for Mac Drawing |
| cdr4 | CorelDraw 4 for Mac Drawing |
| cdr5 | CorelDraw 5 for Mac Drawing |
| cdr6 | CorelDraw 6 for Mac Drawing |
| cds | ChemDraw Stationery Document |
| cds | ConceptDraw PROJECT Slideshow |
| cdsg | DrawMusic Chord Song |
| cdsx | ConceptDraw PROJECT XML SlideShow File |
| cdt6 | CorelDraw 6 for Mac Template |
| cdtx | ConceptDraw PROJECT XML Template |
| cdw | CeledyDraw Document |
| cdw | KOMPAS 3D Drawing |
| cdx | ChemDraw Exchange Document |
| cdxml | ChemDraw XML Document |
| cdy | Cinderella Construction File |
| ce3 | Calendar Creator v3 Document |
| cedx | CardExchange 7 Card Design |
| cer | Broderbund PrintMaster Certificate |
| cfl | CorelFlow Flowchart Document |
| cft | CorelFlow Flowchart Template |
| cg | Guitar Chord Groover Chord |
| cg3 | Cabri 3D Document |
| cgr | Catia V5 Drawing |
| ch3 | Harvard Graphics 3.0 Chart |
| ch4 | Micrografx Charisma 4.0 Presentation |
| chai | Chaimera Artwork Document |
| chait | Chaimera Artwork Document Template |
| chart | MacStitch Design Document |
| chd | Chordastic Chord |
| che | Stitch & Sew Embroidery Design |
| chi | ChiWriter Document |
| chm | Compiled HTML Help |
| chopro | Chord Pro Chord |
| chp | BizInt Smart Charts for Patents Document |
| chp | Corel Ventura Chapter |
| chrt | KDE KChart Document |
| cht | BizInt Smart Charts for Drug Pipelines Document |
| cht | Chemtool Document |
| chtml | Compact HTML Document |
| cida | xplorer2 Scrap Document |
| cidf | Creative ID Document |
| cil | Microsoft ClipArt Gallery Download Package |
| cim | CimPack Design Drawing |
| cip | InPrint 2 Document |
| circuit | KTechlab Circuit Design |
| cit | BibExcel Cited Document |
| ckd | CADKEY Design Document |
| ckd | Kubotek KeyCreator Design Container |
| ckt | CADKEY Template Document |
| ckt | CircuitMaker Document |
| cl2doc | Comic Life 2 Document |
| cl2lyt | Comic Life 2 Layout |
| cl2tpl | Comic Life 2 Document Template |
| cl3 | Easy CD Creator 3 Cover Layout |
| clarify | Clarify Document |
| clb | cdrLabel Label Document |
| clgx | Collage Maker Collage |
| clkb | Clicker Books |
| clkbd | Clicker Board Set |
| clkd | Clicker Docs |
| clkt | Clicker Template |
| clkw | Clicker Word Bank |
| clkx | Clicker Grid Set |
| cln | scanGogh I Scan Document |
| cmdx | Clinical Map Document Based on XML |
| cmdx | CrystalMaker X Document |
| cmk | CardShop Plus Document |
| cml | PADGen Company Info |
| cmp | HotDocs Component File |
| cmp | Solid Edge Wire Harness Design |
| cmp_xml | Solid Edge Wire Harness Design XML |
| cmx | Corel Presentations Exchange Document |
| cnd | ControlDraw Diagram |
| cndx | Avery DesignPro for Mac Document |
| cnote | CollaNote Note Document |
| cnt | Windows Help Content |
| co | Cult3D Object |
| coa | Caligari TrueSpace COA Object |
| cob | Caligari TrueSpace Object |
| coc | BibExcel Co-occurrence Document |
| cod | Atlantis Word Processor Encrypted Document |
| col | HTML Help Collection |
| col | Microsoft Multiplan Spreadsheet |
| comic | Comic Life v1.2 Document |
| comicdoc | Comic Life v1.3 Document |
| comiclife | Comic Life Document |
| comictpl | Comic Life 2 Template |
| comp | Fusion Composition |
| compressed | WordCompress Compacted Web Data |
| contour | Contour Screenplay Document |
| cov | Fax Cover Page |
| cp2 | Compel v2 Presentation |
| cpd | Corel PrintOffice Drawing Document |
| cpdt | Adobe Captivate Design Template |
| cpe | Microsoft Fax Cover Page File |
| cph | Corel Print House Document |
| cpi | Sietronics XRD Scan Document |
| cpo | Corel Print House Document |
| cpp | CA-Cricket Presents Presentation |
| cpr | Corel Presents Presentation |
| cpt | CA-Cricket Presents Template |
| cpt | Pocket Slides Presentation |
| cpx | Corel ArtShow 5 Document |
| cpy | eCopy Document |
| cqp | CompuQuilter Pattern |
| crb | BigOven Core Recipe Box |
| crd | Guitar Chord File |
| crf | CHARTrunner Chart Document |
| crm | CHARTrunner Multi Chart Document |
| crtr | MultiAd Creator Pro Document |
| crv | VCarve Pro Design |
| crv3d | Vectric Aspire Document |
| crw | CADrail Drawing |
| cs | Caditor Document |
| csd | CHI Storage Designer Document |
| csd | Compact Shared Document |
| cse | Cardinal Studio Template File |
| cse | STOIK Stitch Creator Pattern |
| csf | Informative Graphics Content Sealed Format Document |
| csf | OpenText Content Sealed Format Document |
| csg | OpenSCAD Constructive Solid Geometry Model |
| csk | StoryWeaver Template |
| csp | Commonspace Document |
| css | Cascading Style Sheets |
| csv | Comma-Separated Values Data |
| csz | Cornerstone Document Template |
| ct2 | CTRAN/W Graphical Layout |
| ct3 | CTRAN/W Sketch Data |
| ctb | AutoCAD Color-dependent Plot Style Table |
| ctd | Tomahawk Gold Compressed Document |
| cte | Classical Text Editor Document |
| ctex | Chinese TeX Document |
| ctf | WhereIsIt Catalog File |
| ctg | WhereIsIt Catalog Group File |
| ctm | WhereIsIt Template |
| ctp | CardExchange 7 Card Template |
| ctx | Alphacam Compiled Text |
| ctx | Creativyst Table eXchange Document |
| cust | QuarkXPress for Mac Custom Data |
| cvd | Canvas X Drawing |
| cvdtpl | Canvas X Drawing Template |
| cvs | Canvas 3.5 Data |
| cvw | Actuate Analytics Cube Report |
| cvw | CaseView Document |
| cvxcad | Canvas X CADComposer Document |
| cw | CardWorks Template |
| cw3 | ClarisWorks 3 Document |
| cwb | Cakewalk Sonar Bundle |
| cwc | ClarisWorks Color Palette |
| cwdoc | CopyWrite Document |
| cwe | Crossword Express Document |
| cwf | CorelDraw Workspace |
| cwgr | ClarisWorks Drawing Document |
| cwk | ClarisWorks Document |
| cwn | Cifraweb Editor Notation Document |
| cwpt | ClarisWorks Painting Drawing |
| cws | ChordWizard Songtrix Song |
| cws | ClarisWorks Template |
| cwss | ClarisWorks Spreadsheet Document |
| cwt | ChordWizard Songtrix Template |
| cwt | ClarisWorks Texture |
| cww | CU-Writer Document |
| cwwp | ClarisWorks Word Processor Document |
| cwz | Circuit Wizard Document |
| cxbml | BML W5 Model |
| cxl | Content Extraction Language Document |
| cxscript | Celtx Script Document |
| cxt | Adobe Director Protected Cast |
| cyi | Clustify Input File |
| cyp | FCB Cypher Document |
| cz | Czech Language Info File |