| ergo | ERGO Format Data |
| erl | GameGuard Error Log |
| erm | Prosa Entity Relationship Diagram Model |
| ero | eLibrary Reader Object |
| erp | Encarta Researcher Data |
| err | Error Log File |
| ers | PTC Creo Setup Error Report |
| ersx | Eraser Scheduled Task List |
| es | E-Prime E-Studio 1.x Experiment File |
| es2 | E-Prime E-Studio 2.x Experiment File |
| esb | Es-Builder Book |
| esco | Nokia Lumia Windows Phone Firmware |
| escopy | ES Explorer Temporary File |
| esd | Algor SuperDraw 3 Data |
| esds | VSE/VSAM Entry-sequenced Data Set |
| ese | Millions Email Generator Email List |
| ese2 | EDIUS Seek Information Data |
| esedb | Extensible Storage Engine Database |
| esf | MicroEMACS Session Data |
| esf | Steganos Password Manager Container File |
| esform | EasySurveyor Form Data |
| esh | Easy Splitter Splitted Data |
| esi | USoft Application Resources Data |
| esig | HTK Entropic Esignal Format Data |
| esk | eSignal Scan Data |
| esk | Longplay Vesa File |
| eskin | Emperor Media Player Skin Data |
| eslock | ES File Explorer Encrypted Data |
| eslog | EggShell Log |
| esn | Windows XP Cache Data |
