| Acronym | Definition |
|---|
| FEI➣Financial Executives International |
| FEI➣Federation Equestre Internationale (French: International Federation for Equestrian sport) |
| FEI➣Forum d'Entraide Informatique (French: Mutual Information Forum) |
| FEI➣Faculty of Electrical Engineering and Information Technology (Slovakia) |
| FEI➣Federal Executive Institute |
| FEI➣Front End of Innovation |
| FEI➣File Exchange Interface |
| FEI➣Fargo Electronics, Inc. (Eden Prairie, MN) |
| FEI➣Financial Executives Institute |
| FEI➣Fonds Europeen d'Investissement (French: European Investment Fund) |
| FEI➣Fondo Europeo per gli Investimenti (Italian: European Investment Fund) |
| FEI➣Frequency Electronics Inc. |
| FEI➣Faculdade de Engenharia Industrial |
| FEI➣Federal Employer Identification Number |
| FEI➣Franca Esperanto-Instituto (French: French Institute of Esperanto) |
| FEI➣Federation of the Electronics Industry (UK trade association) |
| FEI➣France Europe Immobilier (French real estate company) |
| FEI➣Financial Engines, Inc. |
| FEI➣Foreign Earned Income |
| FEI➣Fortress Energy, Inc. (Canada) |
| FEI➣Falange Española Independiente |
| FEI➣Finnish Energy Industries (trade association) |
| FEI➣Federation of Electronic Industries |
| FEI➣For Everyone's Information |
| FEI➣Free Estradiol Index (hormones) |
| FEI➣Federal Electoral Institute (Election Bureau of Mexico) |
| FEI➣Frequency Error Indicator |
| FEI➣Firing Error Indicator |
| FEI➣Fully Electronic Ignition |
| FEI➣Final Energy Intensity |
| FEI➣Facilities Engineering Items |
| FEI➣Flight Engineer Instructor |
| FEI➣Functionally Emulative Increment |
| FEI➣Force Effectiveness Indicator |
| FEI➣Final Earning Indicator (pension-related calculations) |