| 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 |
| ecmp | WeintekHMI EasyBuilder Pro Compressed Project |
| eco | Informix ESQL/COBOL Source |
| ecore | Eclipse Modeling Data |
| edm | Adobe Dreamweaver EDML File |
| edml | Adobe Dreamweaver EDML File |
| edmx | ADO.NET Entity Data Model Designer Data |
| edoc | Erlang EDoc Document |
| ee | BlackBerry JDE Execution Environment File |
| eep | AVRDUDE Eprom Data |
| eer | Lahey Fortran Error Data |
| egg | Python Egg Package |
| egg-info | Python Egg Metadata |
| egg-link | Python Egg Link |
| egi | Egison Source Code |
| eglib | Adobe Edge Animate Library |
| egrid | Eclipse Grid Data |
| egt | GOLD Parser Enhanced Grammar Table |
| eham | HAM Executable File |
| ejs | Embedded JavaScript Code |
| ejss | Easy JavaScript Simulation Data |
| eka | Eureka Internal Data |
| ekp | Altera Quartus II AES Encryption Key |
| el | Emacs Lisp Code |
| ela | EasyLanguage Archive |
| elb | Synergy/DE Executable Library |
| elc | Emacs Lisp Compiled Bytecode |
| eld | EasyLanguage Document |
| elf | Executable and Linkable Format File |
| elk | Altium Designer Linker Error Messages File |