EFF

EFF or eff may refer to:

Politics

Economic Freedom Fighters, a South African far-left political party
Economic Freedom Fund, an American political organization
Election Fighting Fund, a British suffragist organization supporting the early Labour Party
Electronic Frontier Foundation, a U.S.-based international digital rights group
Evergreen Freedom Foundation, an American political think tank

Eff (duo), a German musical duo
Eff (programming language), a functional programming language with focus on algebraic effects
Effective topos, a model of constructive mathematics based on computability
Efficiency (basketball), a statistical benchmark
Effingham Junction railway station, Surrey, England, a National Rail station code
The Electronic Font Foundry, a British computer type foundry
Emmett/Furla Films, now Emmett/Furla Oasis Films, an American production company
Environmental Film Festival in the Nation's Capital, Washington, D.C., United States
Ethiopian Football Federation, the governing body of association football in Ethiopia
Extrusion freeform fabrication, a method for fabricating functionally graded material
F, a letter of the alphabet
A minced oath of the obscenity Fuck