| 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 |
| els | EasyLanguage Storage |
| emakefile | Erlang Makefile |
| emat | ANSYS Element Matrix Data |
| emcl | microC Library |
| emma | EMMA Data File |
| emof | Eclipse EMOF Model |
| emx | IBM Rational Software Architect Model |
| epl | TallyMan EPL File |
| erb | Erubis Script |
| erb | Ruby ERB Script |
| erc | Ercato Engine Code |
| erl | Erlang Source Code |
| erlang | Erlang Source Code |
| ers | Altium Designer Assembler Error Messages File |
| erubis | Erubis Script |
| es | ECMAScript Source Code |
| es | Sage CRM Script |
| esav | ANSYS Element Saved Data |
| esk | ESock Module Information |
| esl | Microsoft Visual FoxPro Support Library |
| eto | Visual Studio Enterprise Template Object |
| eu | Euphoria Include File |