| dxe | Autodesk AutoCAD Data Extraction Template |
| dxf | DEC DX Document |
| 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 |
| dyn | LS-DYNA Document |
| 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 |
| 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 |