| dx | JCAMP-DX Format Data |
| dx | Oracle Siebel Transaction Data |
| dx1 | JCAMP-DX Format Data |
| dx1 | Linguistica 5 Dictionary 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 |
| 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 | SIR 4000 Captured DZT Image |
| dzt | GPR Software Trace Data |
| dztr | Cyberlink PowerDirector Data |
| dzx | SIR 4000 DZX Header Data |
| dzx | GPR Software Trace Metadata |
| e | STK Ephemeris File |
| e0x | BuildSoft Global Job |
| e2 | Think3 Thinkdesign CAD Document |
| e2d | Energy2D Model |
| e2e | Microsoft BizTalk Server RFID Log |
| e2p | PonyProg Device File |
| e3 | Think3 Thinkdesign CAD Document |