| dwl | Autodesk AutoCAD Drawing Lock |
| dwl2 | Autodesk AutoCAD Drawing Lock |
| dwm | Davis-Wilder Mann Format File |
| dwp | Microsoft Sharepoint Web Part Description |
| dwq | Dreamweaver Saved Query |
| dwr | Dreamweaver Saved Query |
| dws | AutoCAD Drawing Standards |
| dx | JCAMP-DX Format Data |
| dx | OpenDX Data |
| dx | Oracle Siebel Transaction Data |
| dx2 | Oracle Siebel Transaction Data |
| dxi | PayWindow Database |
| dxlamp | DIALux Lamp Exchange Data |
| dxmodule | DX Studio Module |
| dxo | DxO Optics Pro Metadata |
| dxscene | DX Studio Scene |
| dxstream | DX Studio Stream |
| dxtheme | DesktopX Theme File |
| dxtorylic | Dxtory Licence Data |
| dxv | DocXchanger Vector Data |
| dxx | Autodesk AutoCAD Drawing Interchange Attribute |
| dyn | Tinker Dynamics Computation Data |
| dyr | PSS/E Dynamics Data |
| dys | SwordSearcher Daily Devotional Data |
| dzc | Microsoft Photosynth Deep Zoom Collection |
| dzf | IBM SPSS Compressed Data Collection Data |
| dzp | SIR 4000 DZP Playback Data |
| dzs | Download Accelerator Plus Skin |
| dzt | GPR Software Trace Data |
| dzt | SIR 4000 Captured DZT Image |
| dztr | Cyberlink PowerDirector Data |
| dzx | GPR Software Trace Metadata |
| dzx | SIR 4000 DZX Header Data |
| e | STK Ephemeris File |
| e2 | Think3 Thinkdesign CAD Document |
