- ePrints Soton
- Enphase Energy
- Engineers Academy
- EnergyCloud
- Enercon Engineering, Inc.
- Emicro Technologies
- Emicro Technologies
- Emicro Technologies
- Emicro Technologies
- Electrotehnică, Electronică, Automatică (EEA)
- Electronics
- EG Robotics
- EdShare - University of Southampton
- Eddystone User Group
- EasyEDA
- Earthquake Sound
- Eagle Harbor Technologies, Inc.
- Dynamic Controls
- Distech Controls
- Discuss the measurement of power in circuits
