IFF

IFF, Iff or iff may refer to:

Arts and entertainment

 * Indonesian Film Festival, an annual film festival in Indonesia
 * Ischia Film Festival, an annual film festival held on the island of Ischia, Italy
 * Inferno, Flame, and Flint, a software by Autodesk Media and Entertainment
 * "IFF", an episode of The Expanse
 * Iff of the Unpronounceable Name, a fictional character in the Riddle-Master trilogy by Patricia A. McKillip
 * Simon Iff, a fictional character by Aleister Crowley

Mathematics, science, and technology

 * 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 card, a smart card used on bus services in Cardiff, Wales, United Kingdom
 * Interchange File Format, a computer file format

Sports organizations

 * International Fencing Federation (Fédération Internationale d'Escrime or FIE), the international governing body for fencing
 * International Floorball Federation, the global governing body for the sport of floorball
 * Irish Fencing Federation, the governing body for fencing in Ireland

Other organizations

 * Iff Books, an imprint of John Hunt Publishing
 * Independent Fianna Fáil, a political party in Ireland
 * Institute For Figuring, an organization that promotes the public understanding of the poetic and aesthetic dimensions of science, mathematics and the technical arts
 * International Federation of Factory Workers, former trade union international
 * International Flavors & Fragrances, an American corporation which produces flavors and fragrances
 * International Freedom Foundation, a self-described anti-communist group established in Washington, D.C.
 * Fakultät für Interdisziplinäre Forschung und Fortbildung (Faculty for Interdisciplinary Research and Continuing Education), a faculty of the Austrian University of Klagenfurt

Other uses

 * Illicit financial flows, a concept in economics and finance related to resources that are of illegal origin, use or transfer
 * International Finance Facility, proposed by HM Treasury in conjunction with the Department for International Development of the United Kingdom
 * International freight forwarder, an individual or company that books or otherwise arranges space for shipments between countries via common carriers