| Acronym | Definition |
|---|
| EFI➣Electronic Fuel Injection |
| EFI➣Electronics For Imaging |
| EFI➣Extensible Firmware Interface (Intel) |
| EFI➣Energy for Industry (various locations) |
| EFI➣Energy Federation Incorporated |
| EFI➣Error Free Interval |
| EFI➣Extensible Firmware Interface |
| EFI➣European Forest Institute |
| EFI➣Enterprise Florida Inc. |
| EFI➣Euro-Foncier Immobilier (French: Euro-Land Real Estate) |
| EFI➣Evangelical Fellowship of India |
| EFI➣European Federation for Immunogenetics (formerly European Foundation for Immunogenetics) |
| EFI➣Enrico Fermi Institute (University of Chicago) |
| EFI➣Electric Field Instrument (on POLAR) |
| EFI➣Early French Immersion (Canadian language education program) |
| EFI➣Electronic Flight Instrument (aviation) |
| EFI➣Electromechanical Frequency Interference |
| EFI➣Environic Foundation International (Glen Allen, VA) |
| EFI➣Exploding Foil Initiator |
| EFI➣Environment Furniture, Inc. (various locations) |
| EFI➣Europe France Inventeurs (French inventors association) |
| EFI➣Engineer, Furnish, and Install (telecommunications) |
| EFI➣Expeditionary Forces Institute (UK) |
| EFI➣École de Football Intercommunale (French: Intermunicipal Football School) |
| EFI➣European Foundation for Immunogenetics (now European Federation for Immunogenetics) |
| EFI➣external fuel injection |
| EFI➣Electronic Flash Illuminator |
| EFI➣Engineering Function Instruction |
| EFI➣Elektrisitetsforsyningens Forskninginstitutt (Norwegian Electric Power Research Institute) |