| eaglerc | EAGLE Linux User-specific Parameters Data |
| ec7 | EuroCUT Profile Data |
| ecf | Microsoft Outlook Extension Configuration File |
| efc | eFiler Configuration |
| efsp | Effective File Search Parameters Data |
| eftx | Microsoft Office 2007 Theme |
| ehi | HTTP Injector Config |
| ehil | Evozi HTTP Injector Lite Data |
| ein | Skyplot Settings Data |
| ekm | Micro Focus Extra! Keyboard Map |
| elu | LISCAD ESRI Lookup File |
| emv | LabVIEW EuroMeV Configuration File |
| eni | EtherCAT Network Information File |
| epr | Adobe Photoshop AME Preset |
| eqf | WinAMP Equalizer Preset |
| eqp | MathType Preferences |
| equiv | IBM AIX System Configuration Data |
| esc | PRTWIN Escape Codes |
| eset | Extensions Manager Settings Data |
| esi | EtherCAT Slave Information File |
| esy | EmEditor Syntax file |
| evp | EarthView Settings |
| ewc | EWView for DOS Configuration |
| excs | Classic Shell Settings Data |
| exe4j | Exe4j Configuration |
| exportedui | Microsoft Office Exported UI Customization |
| exrc | EX Configuration |
| ext | WinBatch Studio Extender Settings |
| ezhex | Logitech Harmony Saved Configuration |
| fboptsx | FileBoss Settings Data |
| fbt | Abbyy FineReader Document Options File |
| fcfg | Fedora Server Configuration Data |
| fcu | Totalflow PCCU32 Configuration |
| fdoc | Microsoft XPS Document Settings |
| feq | Foobar2000 Equalizer Preset |