"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
'Ea' to 'Eh', 'Ei' to 'Eo', 'Ep' to 'Ez'
| EIA | - | Electronic Industries Association |
| EIAJ | - | Electronic Industries Association of Japan |
| eirp | - | effective isotropically radiated power |
| eirp | - | equivalent isotopically radiated power |
| EIS | - | Emergency Information System |
| EISA 'Bus' | - | Extended Industry Standard Architecture Interface |
| el | - | elevation |
| EL | - | Electro-Luminescent |
| ELECTRO-OPTINT | - | electro-optical intelligence |
| ELED | - | Edge-emitting LED |
| ELF | - | Extremely Low Frequency |
| ELINT | - | electromagnetic intelligence, electronics intelligence |
| ELSEC | - | electronics security |
| ELT | - | emergency locator transmitter |
| EMAC | - | Ethernet MAC |
| EMAC | - | Ethernet Media Access Controller |
| EmbATX | - | Embedded ATX [Motherboard] |
| EMC | - | electromagnetic compatibility |
| EMCON | - | emission control |
| EMD | - | equilibrium mode distribution |
| EME | - | electromagnetic environment |
| emf | - | electromotive force |
| EMI | - | electromagnetic interference |
| EMIF | - | External Memory Interface [EMIF] |
| EMP | - | electromagnetic pulse |
| EMR | - | electromagnetic radiation |
| EMR | - | ElectroMechanical Relay [Relay Manufacturers] |
| EMR | - | electromagnetic radiation hazards |
| e.m.r.p. | - | effective monopole radiated power |
| e.m.r.p. | - | equivalent monopole radiated power |
| EMS | - | electronic message system |
| EMSEC | - | emanations security |
| emu | - | electromagnetic unit |
| EMV | - | electromagnetic vulnerability |
| EMW | - | electromagnetic wave, electromagnetic warfare |
| EMXO | - | Evacuated Miniature Crystal Oscillator |
| ENET | - | Ethernet [Ethernet description] |
| ENIG | - | Electroless Nickel Immersion Gold |
| ENOB | - | Effective Number Of Bits |
| ENQ | - | enquiry character |
| ENR | - | Excess Noise Ratio |
| EO | - | end office |
| E.O. | - | Executive Order |
| EOB | - | End-Of-Block |
| EOC | - | Electrical Optical Converter |
| EOD | - | end of data |
| EOF | - | end of file |
| EOL | - | End Of Life [Life Cycle Definition] |
| EOL | - | end of line [Obsolete term] |
| EOM | - | end of message |
| EOP | - | end of program, end output |
| EOS | - | Electrical Over Stress |
| EOS | - | end-of-selection character |
| EOT | - | end-of-transmission character [ASCII Table] |
| EOT | - | End Of Tape [Obsolete term] |
| EoVSDL | - | Ethernet-over-VDSL |
| EOW | - | engineering orderwire |
