| EFI | Early French Immersion 
| Others |
| EFI | Earn Free Items
| Others |
| EFI | Earth Force, Inc.
| Others |
| EFI | Ecological Forecasting Initiative
| Others |
| EFI | Educational Foundation Inc
| Others |
| EFI | Efik
| Others |
| EFI | Electric Fuel Injection
| Others |
| EFI | Electrical Fuel Injection
| Others |
| EFI | Electronic File Interchange
| Others |
| EFI | Electronic Filing Interface
| Others |
| eFI | electronic Frailty Index
| Others |
| EFI | Electronic Fuel Injection
| Others |
| efi | Electronics for Imaging
| Others |
| EFI | Eletronic Fuel Injection
| Others |
| EFI | Endometriosis Fertility Index
| Others |
| EFI | Energy Federation Inc
| Others |
| EFI | Energy Federation Incorporated
| Others |
| EFI | Engine Fuel Ignition
| Others |
| EFI | Engine Fuel Injection
| Others |
| EFI | Enhanced Forest Inventory
| Others |
| EFI | Enrico Fermi Institute
| Others |
| EFI | Enterprise Florida Inc
| Others |
| EFI | Enterprise Florida, Inc.
| Others |
| EFI | Environmental Fibers International
| Others |
| EFI | Environmentalist Foundation of India
| NGO |
| EFI | Enzyme Function Initiative
| Others |
| EFI | Equestrian Federation of Ireland
| Others |
| EFI | Equitable Food Initiative
| Others |
| EFI | Error Free Interval
| Others |
| EFI | Euromed Feminist Initiative
| Others |
| EFI | European Federation for Immunogenetics
| Others |
| EFI | European Forest Institute
| Others |
| EFI | European Friends of Israel
| Others |
| EFI | Every F Ing
| Others |
| EFI | Every Fabulous Inch
| Others |
| EFI | Exceptional Foresters Inc
| Others |
| EFI | Expert For Innovation
| Others |
| EFI | Exploding Foil Initiator
| Others |
| EFI | Extensible Firmware Interface
| Others |
| EFI | External Firmware Interface
| Others |
| EFI | Extra F***ing Insurance
| Others |
| EFI | Extra Financial Incentives
| Others |