| eqa | WinISI III Equation Data |
| eqb | eSignal Quote Board Data |
| eqbak | EQATEC Profiler Data |
| eqd | Microsoft SQL English Query Domain Data |
| eqd | EquineMax Data |
| eqf | Equalization Filters File |
| eqlog | EQATEC Profiler Log |
| eqn | KaleidaGraph Macro |
| eqr | VecTor5 Ground Acceleration Record Data |
| eqt | ReliaSoft Weibull++ Data |
| equ | AstroDigital.Net Equipment File |
| eqv | IDL EQV Equation Data |
| eqw | SPEFO Equivalent Widths Data |
| er | E-Cell 2 Rule Data |
| era | Electronic Remittance Advice Data |
| erdplus | ERDPlus Database Model |
| ere | EagleEyeOS Report |
| erf | Efficient Reminder v2 Data |
| erfw | Efficient Reminder v5 Data |
| erfx | Efficient Reminder v3 Data |
| erg | CompuTrainer Ergometer Test |
| erg | ErgoVU Data |
| ergo | ERGO Format Data |
| ero | eLibrary Reader Object |
| err | Error Log File |
| 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 |
