| Acronym | Meaning |
 | EMC | Electromagnetic Compatibility |
| EMCAB | Electromagnetic Compatibility Advisory Board |
| EMCON | Emission Control |
| EME | Electromagnetic Environment |
| EMER | Emergency |
| EMERG | Emergency |
| EMI | Electromagnetic Interference |
| EMP | Electromagnetic Pulse |
| EMS | Engine Monitoring System |
| EMSP | Enhanced Mod Signal Processor (an/uys-2 [xn-1](v)) |
| EMT | Elapsed Maintenance Time |
| EMT/MA | Elapsed Maintenance Time Per Maintenance Action |
| EMT/MR | Elapsed Maintenance Time Per Maintenance Requirement |
| EMV | Electromagnetic Vulnerability |
| ENAV | Electronic Navigation |
| ENBL | Enable |
| ENC | Encode |
| ENDR | Endurance |
| ENG | Engine |
| ENGA | Engage |
| ENV | Envelope |
| ENVIR | Environment |
| EOB | Expense Operating Budget |
| EOF | End Of File |
| EOFCS | Electro-optical Fire Control System (seafire) |
| EOGWCM | Electro-optical Guided Weapons Countermeasures |
| EOS | Emergency Oil System |
| EOSS | Engineering Operational Sequencing System |
| EOT | Engineering/operations Trainer |
| EOTAD | Electro-optics Target Acquisition And Designation |
| EOUT | Engine Out |
| EOUT | Flameout |
| EOUTL | Engine Out Left Engine |
| EOUTR | Engine Out Right Engine |
| EPAD | Entry Pad |
| EPL | Equipment Parts List |
| EPROM | Erasable Programmable Read Only Memory |
| EQP | Equipment |
| EQT | Environmental Qualification Test |
| ER | Entity Relationship |
| ERA | Entity-relation-attribute |
| ERP | Effective Radiated Power |
| ERR | Engineering Release Record |
| ERR | Engineering Revision Request |
| ERR | Equivalent Range Rate |
| ERSE | Erase |
| ESA | Emergency Safe Altitude |
| ESA | Environmental Sensor Assessment |
| ESC | Escape |
| ESC | Executive Steering Committee |
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