| dya | Dyalect Source Code |
| dylib | Mach-O Dynamic Library |
| dzi | Silverlight Deep Zoom Image |
| e | E Source Code |
| e | Euphoria Include File |
| e3d | EDGELIB 3D Data |
| e4xmi | Eclipse Application Model Data |
| eao | ETEC Annotated Object |
| eappxbundle | Microsoft Windows 8.1 Encrypted App Bundle Package |
| easyc | EasyC Source Code |
| eax | CA ERwin Exported Data Model |
| eba | Emergence Basic Source Code |
| ebh | Micro Focus Extra! Basic Header |
| ebj | Geoworks Error Checking Object |
| ebl | Ember EBL Bootloader |
| ebm | EXTRA! Basic Macro |
| ebuild | Portage eBuild Script |
| ec | Informix ESQL/C Source |
| ece | Escenic Content Engine Dynamic Page |
| eclipseproduct | Eclipse Product Marker |
| ecma | ECMAScript Source Code |
| ecmp | WeintekHMI EasyBuilder Pro Compressed Project |
| eco | Informix ESQL/COBOL Source |
| ecore | Eclipse Modeling Data |
| ecore2xml | Eclipse EMF Ecore Model Mapping Data |
| edc | Uniface Entity Descriptor Data |
| edm | Adobe Dreamweaver EDML File |
| edml | Adobe Dreamweaver EDML File |
| edmx | ADO.NET Entity Data Model Designer Data |
| edn | Clojure Extensible Data Notation File |
