| 1. | .ex | Euphoria source code file for DOS |
| 2. | .ex3 | Device driver (Harvard Graphics 3.0) |
| 3. | .exc | Exclude file for Optimize (do not process) (QEMM) ◊ Exclusion Dictionary file (Microsoft Word) ◊ Rexx language source code file (VM/CMS) ◊ Text document |
| 4. | .exe | Directly executable program (MSDOS) |
| 5. | .exf | ABS Viewpoint file ◊ Alert System file ◊ Bitmap graphics (Fuji EXIF format) ◊ Execution Form file ◊ Express-G File ◊ FirstStep XG native file ◊ RUPUTER file |
| 6. | .exif | Bitmap graphics (Fuji EXIF format) |
| 7. | .exm | Msdos executable system-manager compliant (HP calculator) |
| 8. | .exp | Express schema (STEP) ◊ Protected mode executable program (PharLap) ◊ Saved chat (ICQ) |
| 9. | .ext | ASCII binary transfer file (WS_FTP Pro, IPSWITCH Software) ◊ Extension file (Norton Commander) ◊ Extract definition file (Tanner Ledit) |
| 10. | .ext2 | Second extended file system (Linux) |