| czd | CAD Zone Drawing |
| czd | The Crash Zone Drawing |
| d2d | 3D Fassade Plus CAD Document |
| dae | Collada Digital Asset Exchange |
| dag | Dagra Document |
| dap | Microsoft Access Data Access Page |
| dbwriter | TechWriter for Databases Document |
| dc | DesignCAD Document |
| dc+ | DataCAD Plus Drawing |
| dc1 | DevCad Document |
| dc2 | DesignCAD 2D Document |
| dc2 | DevCad CAM Pro Document |
| dc3 | DesignCAD 3D Document |
| dc5 | DataCAD Drawing |
| dc5 | DynaCAD v5 Document |
| dc6 | DynaCAD v6 Document |
| dca | IBM DisplayWrite Document |
| dcd | DesignCAD Drawing |
| dch | DipTrace Schematic Document |
| dcw | DynaCAD v4 Document |
| dcx | DesignCAD DCX Drawing |
| dcz | DynaCAD Document |
| ddd | Diagram Designer Document |
| ddif | DIGITAL Document Interchange Format |
| ddrw | ClarisDraw Drawing |
| ddt | Diagram Designer Template |
| de | DrawExpress Diagram Document |
| ded | Dr. Engrave Document |
| des | Intuit QuickBooks Template |
| desd | VivaDesigner Template |
| design | Microsoft Expression Design Drawing |
| dfb | Data Flask Formula |
| dfd | Silverrun DFD Document |
| dfe | RISC OS Comma-separated Values Data |
| dff | RenderWare 3D Model |
| dfg | Data Flask Grid |
| dfm | Help and Manual eBook Template |
| dft | PC Draft v1 Drawing |
| dft | Solid Edge Draft Document |
| dfti | FlexiWrite Document |
| dfx | Softdesk Drafix CAD Document |
| dg | Auto-trol Tech Illustrator Drawing |
| dg | Tekla Xsteel Drawing |
| dg3 | DeltaGraph Document |
| dgk | Delcam 3D Model |
| dgm | Autodesk AutoCAD Civil 3D DGM Document |
| dgm | Lotus Freelance Graphics Diagram |
| dgm | Lotus Freelance Graphics Diagram Data |
| dgn | Bentley MicroStation Drawing |
| dgpd | DeltaGraph Document |
| dgr | DeltaGraph Document |
| dgrh | DeltaGraph for Mac Document |
| dgs | Dagesh Pro Document |
| dhtml | Dynamic HTML Data |
| dhw | ACECAD DigiMemo Memo Document |
| dia | Dia Diagram |
| dia | Psion Organiser Diary Document |
| dif | Data Interchange Format |
| dip | DipTrace PCB Document |
| dis | Oracle Discoverer Workbook |
| diz | Archive Description |
| djc | RootPro CAD Document |
| dk | Danish Language Info File |
| dlst | DLsite Viewer Document |
| dma | IBM Rational DOORS Template |
| dmf | Delgine DeleD Model File |
| dmm | iMindQ 3.0 Mind Map Document |
| dmmt | iMindQ Mind Map Template |
| dmmw | iMindQ Mind Map Workbook |
| dmmx | iMindQ Mind Map Document |
| dmz | DMesh 3D Model |
| doc | Microsoft Word Document |
| docb | XXE Docbook Document |
| doce | Document Manager Encrypted Word Document |
| dochtml | Microsoft Word HTML Document |
| docl | Document Manager Locked Word Document |
| docm | Microsoft Word 2007 Document |
| docmhtml | Microsoft Word 2007 HTML Document |
| doct | OnlyOffice Internal DOCX Document |
| docx | Microsoft Word 2007 Document |
| docxml | Microsoft Word XML Document |
| docz | ThinkFree Online Note Document |
| dor | Digita Organiser Diary |
| dot | Microsoft Word Document Template |
| dot | Nisus Writer Pro Template |
| dotm | Microsoft Word 2007 Template |
| dotx | Microsoft Word 2007 Template |
| dox | MultiMate Document |
| dpa | DrawPlus Animation |
| dpb | Caere FaxMaster Document |
| dpd | Ovation Pro Document |
| dpo | DECAdry Express Business Cards Document |
| dpro | MacDraw Pro Drawing |
| dps | Kingsoft Presentation Document |
| dps | Ovation Pro Style Sheet |
| dpso | WPS Office Presentation Outward Document |
| dpt | Kingsoft Presentation Template |
| dpx | DrawPlus Drawing Template |
| dqy | Microsoft Excel Database Query |
| dr4 | AllyCAD Drawing Document |
| dra | Cadence OrCAD Component Footprint |
| dra | Dolphin PartMaster Drawing Document |
| dra | Scriptor Script |
| drawio | Draw.io Diagram Document |
| drd | PL Designer Document |
| drf | Autodesk 3D Scene |
| drf | PC Draft v4 Drawing |
| drm | Drumlin Secure PDF File |
| drmx | Drumlin Fully Secure PDF File |
| drmz | Drumlin Fully Secure Mobile PDF File |
| drn | DRAKON Editor diagram |
| drp | DReport Document |
| drt | Micrografix Windows Draw Template |
| drw | ANVIL-1000MD Drawing |
| drw | Micrografx Designer Drawing |
| drw | PTC Creo Drawing Document |
| drw | RISC OS Vector Drawing |
| drwdot | SolidWorks Drawing Template |
| dsc | Design Science Equation Editor Data |
| dsd | Autodesk Drawing Set Description |
| dsf | Micrografx Designer Document |
| dsf | Microsoft Belief Network Document |
| dsg | Control Studio 2 Document |
| dsg | Stitch Era Design Document |
| dsi | DESI labeling system telephone label data |
| dsk | TOTAL Sketch Document |
| dsml | Directory Services Markup Language Document |
| dsn | Cadence OrCAD Design |
| dsn | Proteus Electronics Design |
| dsnx | RoadEng Location Design Document |
| dst | Micrografx Designer Template |
| dsv | Delimiter-Separated Values |
| dtc | Weresc CADE Drawing |
| dtd | Document Type Definition |
| dtg | Desktop Guitarist Music Score |
| dtp | Page Express DTP Document |
| dtx | Fiberworks Document |
| dtz | Circulus DigiGraph Document |
| dvg | Micrografx Graphics Works Document |
| dvi | Device Independent File |
| dw | DesignWorkshop Data |
| dw2 | DesignCAD for Windows 2D Drawing |
| dw4 | DisplayWrite 4 Document |
| dwa | Project Dogwaffle Animation |
| dwb | VariCAD 2D/3D Document |
| dwd | Davka Writer Document |
| dwdoc | DrawWell Document |
| dwf | Autodesk Design Web Format Document |
| dwfdot | Altium Designer Draftsman Document Template |
| dwfx | Autodesk DWF XPS Document |
| dwg | Autodesk AutoCAD Drawing |
| dwg | BravoDRAFT Document |
| dwh | WaterGEMS Drawing |
| dwk | DADiSP Worksheet |
| dwsdot | Altium Designer Draftsman Sheet Template |
| dwt | Autodesk AutoCAD Template |
| dwt | Dreamweaver Web Template File |
| dwx | CADLock Locked AutoCAD Drawing |
| dwz | Autodesk AutoCAD Compressed Drawing |
| dx | DEC DX Document |
| dxa | hsbCAD Document |
| dxb | Autodesk Drawing Interchange Binary |
| dxb | Duxbury Braille Document |
| dxd | Diogenes Extended Document |
| dxe | Autodesk AutoCAD Data Extraction Template |
| dxf | Autodesk Drawing eXchange File |
| dxg | Duxbury Braille Translation Graphic File |
| dxl | IBM Rational DOORS eXtension Language Document |
| dxn | Fujitsu DexNet 200 Fax Document |
| dxp | Duxbury Print Document |
| dxpx | Design Expert Design |
| dyna | LS-DYNA Document |
| dzl | DazzlerMAX Document |
| dzm | DirectorZone Menu Template |
| dzt | DirectorZone Title Template |
| e3v | E3.series Viewer File |
| ead | EAD Document |
| eaf | ELAN Annotation Format Document |
| easm | eDrawing Assembly Document |
| easmx | Microsoft XPS Assemply Document |
| ebc | EBCDIC Document |
| ebq | CITE Document |
| eca | Casio Data Projector Presentation |
| ecf | Efficient Calendar v2 Document |
| ecf | Embird Cross Stitch Format File |
| ecfw | Efficient Calendar v5 Document |
| ecfx | Efficient Calendar v3 Document |
| ecsv | Encapsulated Comma Separated Value File |
| ect | Yozo Office Chart Template File |
| ecw | EasyCAD for Windows Drawing |
| ecx | Chordastic Export |
| ed | EasyDraw CAD Drawing |
| edd | Adobe FrameMaker EDD Document |
| edf | Efficient Diary v2 Document |
| edfw | Efficient Diary v5 Document |
| edfx | Efficient Diary v3 Document |
| edg | Edge Diagrammer Document |
| edif | Electronic Design Interchange Format File |
| edrw | eDrawing Drawing Document |
| edrwx | Microsoft XPS Drawing Document |
| edrwx | XPS Drawing Document |
| edt | Edraw Max Template |
| edw | SolidWorks eDrawings Document |
| edx | Edraw Max Document |
| edxz | Edraw Max Compressed Document |
| eef | Embird Editor File |
| eff | Efficient PIM v2 Data |
| effw | Efficcess Data |
| effw | Efficient PIM v5 Data |
| effx | Efficient PIM v3 Data |
| efm | Electronic Fiction Manuscript |
| efr | Elixir DesignPro Tools New Form |
| efw2 | Electronically Filled W-2 Form |
| efw2c | Electronically Filled W-2c Form |
| efx | eFax Document |
| egc | EximiousSoft GIF Creator Document |
| egx | EasyGrapher Document |
| eim | Electric Image Model |
| ejf | Zebra EPL2 Label |
| ekm | EXP Macro |
| elfo | ElsterFormular Form |
| elx | Elixir DesignPro Tools Form |
| emaze | Emaze Presentation |
| embf | Janome Memory Craft Embroidery Design |
| emcam | Mastercam HLE Document |
| emcmf | EMC Documentum Message |
| emcx | Mastercam X Educational Document |
| emd | Elna Embroidery Design Document |
| eml | Microsoft Outlook Express E-Mail |
| emm | MindMaple Map Document |
| emmt | MindMaple Map Template |
| emr | Emrite Document |
| en | English Language Info File |
| enc | CopySafe Protected PDF Document |
| enf | Efficient Notes v2 Document |
| enfw | Efficient Notes v5 Document |
| enfx | Efficient Notes v3 Document |
| enml | Evernote for Android Note |
| ent | SGML/XML External Entity |
| env | Broderbund PrintMaster Envelope |
| enx | eNeighborhoods Document |
| enx | EverNote Document |
| eof | Embird Vector Embroidery Format File |
| eop | Everyone Piano Music Score File |
| eopm | EOP Music Master Composed Music |
| eot | ExamView Online Test Data |
| epa | ePhotoAlbum Album Data |
| epdf | Encapsulated Portable Document Format |
| epl | Eltron Programming Language Document |
| epm | Efficient Password Manager v2 Document |