| ewc2 | EDIUS Waveform Cache |
| ewd | Enigma Flight Planner Database |
| ewf | EnCase Expert Witness Compression Format Data |
| ewnet | Electronics Workbench Ultiboard Netlist Data |
| ews | EasyWorship Schedule Data |
| ewsx | EasyWorship Schedule Data |
| ewz | EdgeWize Compressed Encoded Data |
| exa | TINA Task List |
| exam | ProfExam Exam Data |
| exc | Microsoft Word Exclude Dictionary |
| exd | Microsoft Office Control Information Cache |
| exd | JSDAI Express Dictionary Data |
| exf | EXIF Metadata |
| exg | JSDAI Express-G Data |
| exhibeo | Exhibeo Photo Gallery |
| exi | Efficient XML Interchange Data |
| exif | EXIF Metadata |
| exm | Exam Document |
| exo | Motorola EXORmacs Data |
| exp | Affymetrix Experiment File |
| exportedfavorites | Transmit Exported Favorites |
| expressionmap | Cubase Expression Map |
| extra | BreakPad Crash Log Extra Data |
| extrep | Sage External Representation |
| extz | Extron PCS Configuration Backup |
| exx | IBM Linkway MsgPut Data |
| exy | ISIS GIS Diagnostic Data |
| ex_ | Compressed EXE File |
| eyd | ASL EYE-TRAC PC Data |
| eyetvp | EyeTV Recording Metadata |
