IFF, Iff or iff may refer to:

Arts and entertainment edit

Film festivals edit

Other uses in the arts edit

Mathematics, science, and technology edit

  • Identification friend or foe, an electronic radio-based identification system for the military
  • If and only if, a biconditional logical connective between statements, where either both statements are true or both are false
  • IFF (software), a series of compositing and visual effects applications (Inferno, Flame, and Flint) made by Autodesk Media and Entertainment
  • Iff card, a smart card used on bus services in Cardiff, Wales, United Kingdom
  • Interchange File Format, a computer file format

Organizations edit

Sports organizations edit

Other organizations edit

Other uses edit

See also edit