| 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 | GPR Software Trace Metadata |
| dzx | SIR 4000 DZX Header Data |
| e | STK Ephemeris File |
| e2 | Think3 Thinkdesign CAD Document |
| e2d | Energy2D Model |
| e2e | Microsoft BizTalk Server RFID Log |
| e2p | PonyProg Device File |
| e3 | Think3 Thinkdesign CAD Document |
| e57 | Lidar E57 Point Cloud Data |
| e60 | MicroPAVER 6.0 Data |
| e78 | IBM 3270 Terminal Emulator Screen Layout Data |
| eab | Sybase PowerDesigner Enterprise Architecture Model Backup |
| eac | EmEditor Auto Complete File |
| eaf | MicroEMACS Abbreviation File |
| eal | Enfocus PitStop Action List |
| eam | Sybase PowerDesigner Enterprise Architecture Model |
| eas | RSLogix 5000 Symbol Data |
| eas3 | EAS3 Data |
| ebb | Empower Business Bulletin Data |
| ebb | The Bat! Encrypted Message Archive |
| ebcdic | EBCDIC Encoded Data |
| ebd | IBIS Electrical Board Description |
| ebf | Efficient Binary Format Data |
| ebi | The Bat! Encrypted Message Index |