| Acronym | Definition |
|---|
| EFO➣Experimental Factor Ontology (software) |
| EFO➣Executive Fire Officer |
| EFO➣Étoile Filante de Ouagadougou (Burkinabé football club) |
| EFO➣Eddie from Ohio (Virginia pop folk band) |
| EFO➣Educational Foundation of Orinda (Ordina, CA) |
| EFO➣Electronic Flame Off |
| EFO➣European Federation of Osteopaths |
| EFO➣Établissements Français d'Océanie (French: French Settlements in Oceania) |
| EFO➣Exception to Fair Opportunity |
| EFO➣Errors Freaks and Oddities (philately) |
| EFO➣Efficient Fiber Optics |
| EFO➣Electronic Financial Officer |
| EFO➣Earnings from Operations |
| EFO➣Enabled, then Firing Once (STRPN transition) |
| EFO➣Egg Farmers of Ontario (Mississauga, ON) |
| EFO➣Emergency Field Office |
| EFO➣Exponential Financial Options (South Africa) |
| EFO➣Equivalent Field Office |
| EFO➣Executive Financial Officer |
| EFO➣Energy for Opportunity (Canada; est. 2008) |
| EFO➣Experience Factory Organization (software development) |
| EFO➣Executive Field Operations (Indian IT companies) |