| Acronym | Definition |
|---|
| FEL | Felony |
| FEL | Free Electron Laser |
| FEL | Foundation for Early Learning (various organizations) |
| FEL | Florida Electronic Library |
| FEL | Felini (gaming) |
| FEL | Flandra Esperanto-Ligo (Esperanto: Flemish Esperanto League; Belgium) |
| FEL | Flywheel End Left |
| FEL | Fédération des Étudiants Libéraux (French: Liberal Students Federation; Belgium) |
| FEL | Fédération des Étudiants Lyonnais (French: Lyonnais Federation of Students; Lyon, France) |
| FEL | Flash Exposure Lock (cameras) |
| FEL | Family Emission Limit |
| FEL | Future Event List (computer programming) |
| FEL | Foundation for Endangered Languages |
| FEL | Familial Erythrophagocytic Lymphohistiocytosis |
| FEL | Front End Load(ing) |
| FEL | Fair Employment Law (Wisconsin) |
| FEL | First Edition Library (book) |
| FEL | Fedora Electronic Lab (simulation platform hardware) |
| FEL | Fujitsu Europe, Ltd. |
| FEL | Future Economic Loss (Workplace Safety and Insurance Act 1998, Canada) |
| FEL | Front Elevation |
| FEL | Fluids Engineering Laboratory (Japan) |
| FEL | Family Education Loan (various programs) |
| FEL | Frank Effect Level |
| FEL | First Element Launch |
| FEL | Fixed Equity Loan (mortgages) |
| FEL | Fallen Empire: Legions (gaming) |
| FEL | Fujikura Europe Limited (UK) |
| FEL | Full Employment League |
| FEL | Free Elastic Limit |
| FEL | Faltec Europe Limited (Japan) |
| FEL | Federal Explosives License/permit |
| FEL | Fysisch Electronisch Laboratorium (Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek) |
| FEL | Feature Exchange Language |
| FEL | Federal Emission Limit |
| FEL | Fire Extinguisher License |
| FEL | Feldberg Radio Relay (Germany) |