| exam | ProfExam Exam Data |
| exc | Microsoft Word Exclude Dictionary |
| exd | JSDAI Express Dictionary Data |
| exd | Microsoft Office Control Information Cache |
| exf | EXIF Metadata |
| exg | JSDAI Express-G Data |
| exif | EXIF Metadata |
| exm | Exam Document |
| exo | Motorola EXORmacs Data |
| exp | Affymetrix Experiment File |
| extra | BreakPad Crash Log Extra Data |
| extrep | Sage External Representation |
| extz | Extron PCS Configuration Backup |
| exx | IBM Linkway MsgPut Data |
| ex_ | Compressed EXE File |
| eyd | ASL EYE-TRAC PC Data |
| eyetvp | EyeTV Recording Metadata |
| eyetvsched | EyeTV Schedule Data |
| eyml | Visual Studio Code EYML Data |
| eyp | Eyapp Grammar Data |
| ezc | Autodesk AutoCAD ecscad Component Backup |
| ezd | WSxM Image Data |
| ezl | EasyLog Log Record |
| ezlog | Skype Extras Manager Log |
| ezm | EasyOffice Mail Data |
| eztut | Logitech Harmony Tutor Data |
| eztutor | Logitech Harmony Tutor Data |
| ezup | Logitech Harmony Firmware Upgrade |
| ezupgrade | Logitech Harmony Firmware Upgrade |
| f01 | HEC-RAS Flow File |
| f02 | HEC-RAS Flow File |
| f03 | HEC-RAS Flow File |
| f04 | HEC-RAS Flow File |
| f05 | HEC-RAS Flow File |
| f06 | HEC-RAS Flow File |