| Acronym | Definition |
|---|
| ESL | English as a Second Language |
| ESL | Electronic Sports League |
| ESL | Electronic System Level |
| ESL | Energy Systems Laboratory |
| ESL | Extended Shelf Life |
| ESL | Electrostatic Loudspeaker |
| ESL | Eighteenth Street Lounge (record label) |
| ESL | Equivalent Series Inductance (L is inductance) |
| ESL | Elista (Russia) |
| ESL | Electronic Shelf Label |
| ESL | Exit Stage Left (Rush album) |
| ESl | East Slavic (linguistics) |
| ESL | Equivalent Series Inductance (electronic component leads) |
| ESL | Electron-Stimulated Luminescence (lighting technology) |
| ESL | Electrochemical and Solid-State Letters (electronic journal) |
| ESL | Electronic Systems Laboratory |
| ESL | Embedded Systems Laboratory |
| ESL | Eastman Savings and Loan (Bank in Rochester, NY) |
| ESL | Electronic Software Licensing |
| ESL | Electrostatic Levitator (NASA Marshall Space Flight Center) |
| ESL | Expected Service Life |
| ESL | etch-stop layer |
| ESL | Economic Service Life |
| ESL | Earned Sick Leave (employment-human resources) |
| ESL | Explorer Scout Leader |
| ESL | Emergency Service Level (FAA) |
| ESL | European Sales List |
| ESL | Enterprise Software Licensing |
| ESL | End-User Subscription Licensing |
| ESL | Equivalent Single-Layer |
| ESL | Eng S Lustig Consulting Engineers Ltd (Tel-Aviv, Israel) |
| ESL | Engine Speed Limit |
| ESL | Ecological Screening Level |
| ESL | Errored Second-Line |
| ESL | Emergency Staffing Level |
| ESL | East Side LAN (Phoenix/Mesa/Chandler Arizona LAN Organization) |
| ESL | Equipment and Supply List |
| ESL | Electro Signal Labs (GE Security) |
| ESL | Engine Speed Limiting (system) |
| ESL | External Sensor Lab (US DoD) |
| ESL | Emitter Signal Library |
| ESL | Enviroplan Services Limited |
| ESL | Ecological Studies on the Lepidoptera |
| ESL | English Sign Language |
| ESL | End of Service Life (product lifetime) |
| ESL | Employer Stop Loss (insurance) |
| ESL | Elementary School Level (various locations) |
| ESL | European Super League (sports) |