| e-GIF | e-Government Interoperability Framework |
| E1 | 2,048 Mb/s |
| E3 | 34,368 Mb/s |
| EAI | Enterprise Application Integration |
| EAM | Electro-Absorption Modulator |
| EAROM | Electrically Alterable Read-Only Memory |
| EASE | Equipment And Software Emulator |
| E-BEAM | Electron Beam |
| EBCDIC | Extended Binary Coded Decimal Interchange Code |
| EBHT | Electron Beam High Throughput lithography |
| EBIC | Electron-Beam-Induced Current |
| EBP | Electron Beam Pumping |
| EBR | Edge Bead Removal |
| EBSP | Electron Backscattering Pattern |
| EBU | European Broadcasting Union |
| EC | Engineering Change; Equipment Controller |
| ECAD | Electronic Computer-Aided Design; Engineering Computer-Aided Design |
| ECAE | Electronic Computer-Aided Engineering |
| ECCB | Electronic Components Certification Board |
| ECG | Electro CardioGram |
| ECL | Emitter Coupled Logic |
| ECM | Electronic Counter-Measures |
| ECN | Engineering Change Notice |
| ECO | Engineering Change Order |
| ECP | Electron Channeling Pattern |
| ECQB | ElectrocChemical Quartz crystal Balance |
| ECR | Electron Cyclotron Resonance; Engineering Change Request; Equivalent Circuit Rate |
| ECW | Enhanced Compressed Wavelet |
| ED | ElectroDeposited |
| EDA | Electronic Design Automation |
| EDAX | Energy-Dispersive Analysis of X-rays (TM name for EDS) |
| EDD | Earliest Due Date |
| EDEPR | Electrically Detected EPR |
| EDENDOR | Electrically Detected ENDOR |
| EDFA | Erbium-Doped Fibre Amplifier |
| EDGE | Enhanced Data rates for GSM Evolution |
| EDI | Electronic Data Interchange |
| EDIF | Electronic Design Interchange Format |
| EDL | Electric Double Layer; Edit Decision List |
| EDM | Electronic Design Machining |
| EDO | Extended Data Out |
| EDO-RAM | Extended Data Output RAM |
| EDP | Electron Diffraction Pattern; Ethylene Diamine Pyrocatechol; Electronic Data Processing |
| EDS | Energy-Dispersive (X-ray) Spectroscopy (aka EDX & EDAX) |
| EDTV | Enhanced Definition TV |
| EDU | Equipment Dependent Uptime |
| EDX | Energy-Dispersive X-ray analysis (aka EDAX and EDS) |
| EDXA | Energy-Dispersive X-ray Analysis |
| EEDF | Electron Energy Distribution Function |
| EEL | Edge Emitting Laser |
| EELS | Electron Energy Loss Spectroscopy |
| EEPLD | Electrically Erasable Programmable Logic Device |
| EEPROM | Electrically Erasable Programmable Read Only Memory |
| EFG | Electric Field Gradient |
| EFO | Electronic Flame-Off |
| EFOCS | Evanescent Fiber Optic Chemical Sensors |
| EFTIR | Emission Fourier Transform InfraRed spectroscopy |
