| Acronym | Definition |
|---|
| FEEO➣Fédération des Enseignantes et des Enseignants de l'Elémentaire de l'Ontario (French: Federation of Teachers and Elementary Teachers of Ontario; Canada) |
| FEEO➣Fiber-Edge Electro-Optic |
| FEEO➣Fuel Efficient Engine Operation |
| FEEO➣Field Emission Electric Propulsion |
| FEEO➣Fundasaun Esperansa Enclave Oecusse (rural development; East Timor) |