FIAF may refer to: Fasting-Induced Adipose Factor or ANGPTL4, a protein or International Federation of Film Archives, a Paris-based association of film archivists Finnish Air Force Fleet Intelligence Adaptive Force, a U.S. military intelligence unit reporting to Navy Cyber Forces French Institute Alliance Française, a New York-based organization for the promotion of Francophone culture La Federación Interamericana de Filatelia, a philatelic organisation for North and South America