English abbreviations from ef to effc
- EF (Electro-focus (Canon lens mount))
- EFA (Education For All)
- EFAB (Etablissement d'Etudes et de Fabrications d'Armement de Bourges)
- EFAC (Emergency Family Assistance Center)
- EFBD (Elder Friendly Business District)
- EFC (equivalent full charge)
- EFCR (equivalent full charge rounds)
- EFD (Electronic flight display)
- EFDD (External Floppy Disk Drive)
- EFE (Early Fuel Evaporation)
- EFELDF (Eagle Forum Education and Legal Defense Fund)
- EFF (Electronic Frontier Foundation)
- EFFA (Equal Footing For Animals)
- EFFC (East Finland Film Commission)