| Abbreviation | Definition |
|---|---|
| ESA | Electricity Supply Authority |
| ESAA | Eastern Service Area Authority |
| ESMA | Emirates Standards and Metrology Authority |
| ESTA | Emergency Services Telecommunications Authority |
| ESWA | Easton Suburban Water Authority |
| ESWMA | Enugu State Waste Management Authority |
| ETAS | Electronic Travel Authority System |
| ETEA | Entrance Test Evaluation Authority |
| EWA | Electricity and Water Authority |
| FAAN | Federal Airport Authority of Nigeria |
| FADC | Full Authority Digital Control |
| FADEC | Full Authority Digital Engine Controls |
| FAINT | Funds Authority Interest Need Timing |
| FANI | Fire Authority of Northern Ireland |
| FANR | Federal Authority for Nuclear Regulation |
| FAOA | Federal Audit Oversight Authority |
| FATHER | Futuristic Authority Teaching Hidden Experiences Reliably |
| FATO | Full Authority to Operate |
| FBOA | Football Banning Orders Authority |
| FCDA | Federal Civil Defense Authority |