| dwh | Autodesk AutoCAD DWGLOG Log |
| dwi | BrainVoyager QX Diffusion-weighted Image |
| dwk | Autodesk AutoCAD Drawing Lock |
| 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 | OpenDX Data |
| dx | JCAMP-DX Format Data |
| dx | Oracle Siebel Transaction Data |
| dx1 | Linguistica 5 Dictionary Data |
| dx1 | JCAMP-DX Format Data |
| dx2 | Oracle Siebel Transaction Data |
| dxi | PayWindow Database |
| dxlamp | DIALux Lamp Exchange Data |
| dxls | DashXL Skin Set |
| 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 |
| dym | DynMenu Menu Data |
| 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 |