| Abbreviation | Definition |
|---|---|
| ELCI | Environment Liaison Centre International |
| ELCIWA | Electronics Component Industries Association |
| ELD | Equivalent Lens Diameter |
| ELDISC | Electrical Disconnect |
| ELDO | European Launcher Development Organisation |
| ELDV | Electrically Operated Depressurization Valve |
| ELECTRA | Enhanced Light Efficiency Cophasing Telescope Resolution Actuator |
| ELF | Extremely Low Frequency |
| ELH | Entire Life History |
| ELINT | Electromagnetic Intelligence |
| ELL | Equivalent Loudness Level |
| ELL | Elongation Factor Homologous To Mixed Lineage Leukemia |
| ELLF | Expected Log-Likelihood Function |
| ELM | Emitted Light Modulation |
| ELM | Environment Landscape Management |
| ELM | Environmental Liabilities Management |
| ELM | Extended Lunar Mission |
| ELM | Elaboration Likelihood Model |
| ElM | Extended Length Method |
| ELMF | Emitted Light Modulation Frequency |
| ELMQ | Elaboration Likelihood Model Questionnaire |
| ELMS | Environmental Land Management Scheme |
| ELMS | Elastic Loop Mobility System |
| ELMT | Electro-Mechanical Technology |
| ELMT | ELectrical Maintenance Technician |
| ELNES | Energy-Loss Near-Edge Structure |
| ELO | Explosives Liaison Officer |
| ELPAT | Environmental Lead Proficiency Analytical Testing Program |
| ELPG | Extended Life Premium Generator |
| ELS | Earth Landing System |
| ELS | Eastern Launch Site |
| ELS | Elevon Load System |
| ELS | Emergency Landing Site |
| ELS | Energy Loss Spectroscopy |
| ELSC | Earth Landing Sequence Controller |
| ELSS | Emergency Life Support System |
| ELSS | Equity Linked Saving Schemes |
| ELT | Elementary Laboratory Technology |
| ELT | Emergency Locator Transmitter |
| ELV | End-of-Life Vehicles |
| ELV | Expendable Launch Vehicle |
| ELV | Earth Launch Vehicle |
| ELV | Electrically Operated Valve |
| ELV | Expendable Launch Vehicle Integrated Support |
| EM | Education Minister |
| EM | Electron Microscope |
| EM | Emmetropia |
| EM | Extra Mechanic |
| EM | Emergency Landing Weight |
| EM | Engineering Model |