| Extension | File Description |
| .EC5 | Uncommon Files |
| .EC6 | Uncommon Files |
| .EC7 | Uncommon Files |
| .EC8 | Uncommon Files |
| .EC9 | Uncommon Files |
| .ECA | Uncommon Files |
| .ECB | Uncommon Files |
| .ECC | Data Files |
| .ECD | Uncommon Files |
| .ECE | Web Files |
| .ECELP4800 | Audio Files |
| .ECELP7470 | Audio Files |
| .ECELP9600 | Audio Files |
| .ECF | Plugin Files |
| .ECG | Uncommon Files |
| .ECH | Uncommon Files |
| .ECHO | Uncommon Files |
| .ECHO6 | Uncommon Files |
| .ECHOING | Uncommon Files |
| .ECHR | Uncommon Files |
| .ECI | Uncommon Files |
| .ECJ | Uncommon Files |
| .ECK | Uncommon Files |
| .ECL | Data Files |
| .ECLIPSEPRO | Uncommon Files |
| .ECM | Disk Image Files |
| .ECMA | Developer Files |
| .ECMS | Uncommon Files |
| .ECMT | Uncommon Files |
| .ECN | Uncommon Files |
| .ECO | Database Files |
| .ECP | Developer Files |
| .ECQ | Uncommon Files |
| .ECR | Uncommon Files |
| .ECRAN | Uncommon Files |
| .ECS | Compressed Files |
| .ECT | Uncommon Files |
| .ECU | Uncommon Files |
| .ECV | Uncommon Files |
| .ECW | Raster Image Files |
| .ECW2002PUZ | Uncommon Files |
| .ECW2002WOR | Uncommon Files |
| .ECX | Uncommon Files |
| .ECY | Uncommon Files |
| .ECZ | Uncommon Files |
| .ED | Uncommon Files |
| .ED0 | Uncommon Files |
| .ED1 | Uncommon Files |
| .ED2 | Uncommon Files |
| .ED2K | Uncommon Files |
| .ED3 | Uncommon Files |
| .ED4 | Uncommon Files |
| .ED5 | Uncommon Files |
| .ED6 | Uncommon Files |
| .ED7 | Uncommon Files |
| .ED8 | Uncommon Files |
| .ED9 | Uncommon Files |
| .EDA | Disk Image Files |
| .EDB | Database Files |
| .EDC | Misc Files |
| .EDD | Uncommon Files |
| .EDE | Disk Image Files |
| .EDF | Data Files |
| .EDG | Data Files |
| .EDH | Uncommon Files |
| .EDI | Uncommon Files |
| .EDIT | Uncommon Files |
| .EDIT0 | Uncommon Files |
| .EDITHELP | Uncommon Files |
| .EDITOR | Uncommon Files |
| .EDJ | Uncommon Files |
| .EDK | Disk Image Files |
| .EDL | Video Files |
| .EDM | Developer Files |
| .EDML | Developer Files |
| Extension | File Description |
| .EDN | CAD Files |
| .EDO | Uncommon Files |
| .EDP | Uncommon Files |
| .EDPI | Uncommon Files |
| .EDQ | Disk Image Files |
| .EDR | Uncommon Files |
| .EDRW | CAD Files |
| .EDS | Disk Image Files |
| .EDT | Uncommon Files |
| .EDU | Uncommon Files |
| .EDV | Disk Image Files |
| .EDW | Uncommon Files |
| .EDX | Uncommon Files |
| .EDY | Uncommon Files |
| .EDZ | Uncommon Files |
| .EE0 | Uncommon Files |
| .EE1 | Uncommon Files |
| .EE2 | Uncommon Files |
| .EE3 | Uncommon Files |
| .EE4 | Uncommon Files |
| .EE5 | Uncommon Files |
| .EE6 | Uncommon Files |
| .EE7 | Uncommon Files |
| .EE8 | Uncommon Files |
| .EE9 | Uncommon Files |
| .EEA | Uncommon Files |
| .EEB | Uncommon Files |
| .EEC | Uncommon Files |
| .EED | Uncommon Files |
| .EEE | Uncommon Files |
| .EEF | Uncommon Files |
| .EEG | Uncommon Files |
| .EEH | Uncommon Files |
| .EEI | Uncommon Files |
| .EEJ | Uncommon Files |
| .EEK | Uncommon Files |
| .EEL | Uncommon Files |
| .EEM | Uncommon Files |
| .EEN | Uncommon Files |
| .EEO | Uncommon Files |
| .EEP | Data Files |
| .EEQ | Uncommon Files |
| .EER | Uncommon Files |
| .EES | Uncommon Files |
| .EET | Uncommon Files |
| .EEU | Uncommon Files |
| .EEV | Uncommon Files |
| .EEW | Uncommon Files |
| .EEX | Uncommon Files |
| .EEY | Uncommon Files |
| .EEZ | Uncommon Files |
| .EF | Uncommon Files |
| .EF0 | Uncommon Files |
| .EF1 | Uncommon Files |
| .EF2 | Uncommon Files |
| .EF3 | Uncommon Files |
| .EF4 | Uncommon Files |
| .EF5 | Uncommon Files |
| .EF6 | Uncommon Files |
| .EF7 | Uncommon Files |
| .EF8 | Uncommon Files |
| .EF9 | Uncommon Files |
| .EFA | Audio Files |
| .EFB | Uncommon Files |
| .EFC | Uncommon Files |
| .EFD | Uncommon Files |
| .EFDEMO | Uncommon Files |
| .EFE | Audio Files |
| .EFF | Uncommon Files |
| .EFFECT | Uncommon Files |
| .EFG | Uncommon Files |
| .EFH | Uncommon Files |
| .EFI | System Files |
| .EFIF | Data Files |
| .EFJ | Uncommon Files |
