| Extension | 描述 | 檔案格式 |
|---|
| e2p | PonyProg Device File | Developer Files |
| ecf | Outlook Add-on File | Misc Files |
| ecf | Exchange Extended Configuration File | 設定檔 |
| ecm | Error Code Modeler File | 磁碟映像檔 |
| edb | Exchange Information Store Database File | 資料檔 |
| efi | Extensible Firmware Interface File | 系統檔案 |
| egg | ALZip Copmpressed File | 壓縮檔案 |
| egisenc | eDataSecurity Encrypted File | 加密檔案 |
| eix | Metin 2 Game File | 遊戲檔案 |
| elf | Executable Game Data File | 遊戲檔案 |
| emc | Striata Encrypted E-mail Attachment File | 加密檔案 |
| eml | Email Message File | Misc Files |
| emu | Bitcom Data File | Misc Files |
| emulecollection | eMule Plus Data File | Misc Files |
| emz | Windows Compressed Enhanced Metafile | 圖檔 |
| enc | Encoded File | Encoded Files |
| eng | English Language File | Misc Files |
| ens | Ensemble File | 聲音檔案 |
| env | Adobe Acrobat Dictionary File | Misc Files |
| enw | EndNote Import File | Misc Files |
| epf | Encapsulated Postscript File | 3D Files |
| epk | Metin 2 Game Data File | 遊戲檔案 |
| eps | Encapsulated Postscript | 圖檔 |
| epub | Open Electronic Book File | 文字檔 |
| err | Visual FoxPro Error File | 文字檔 |
| ert | Heroes of Might & Magic Script File | 遊戲檔案 |
| esm | Elder Scrolls Game File | 遊戲檔案 |
| esp | ACD/Labs Data File | 資料檔 |
| ess | Easy Spreadsheet Spreadsheet File | 試算表檔案 |
| et | Easitech Lesson Data File | 資料檔 |
| etl | Microsoft Event Trace Log File | 資料檔 |
| ets | eSignal Time and Sales File | Misc Files |
| ex | Norton Ghost Template File | 3D Files |
| ex4 | Expert Advisor File | 資料檔 |
| exd | Control Information Cache File | Misc Files |
| exe | Executable File | 執行檔 |
| exp | Export File | 資料檔 |
| ext | Norton Commander Extension | Misc Files |
| ex_ | Compressed Executable File | 執行檔 |