| Acronym | Definition |
|---|
| IFF➣Identification, Friend or Foe |
| IFF➣I Feel Fine (Beatles song) |
| IFF➣International Film Festival |
| IFF➣If and Only If |
| IFF➣Interchange File Format |
| IFF➣International Flavors and Fragrances |
| IFF➣Introduction to Fighter Fundamentals (US Air Force flight training) |
| IFF➣Image File Format |
| IFF➣Independent Film Festival |
| IFF➣Institut Fuer Festkoerperforschung (German: Institute of Solid State Research) |
| IFF➣Initial Face-to-Face |
| IFF➣International Finance Facility |
| IFF➣International Floorball Federation (Helsinki, Finland) |
| IFF➣Ischia Film Festival (Italy) |
| IFF➣International Food Festival |
| IFF➣Fraunhofer-Institut für Fabrikbetrieb und -Automatisierung (German: Fraunhofer Institute for Factory Operation and Automation) |
| IFF➣International Feldenkrais Federation (education; est. 1992) |
| IFF➣International Freight Forwarders (various locations) |
| IFF➣International Fencing Federation |
| IFF➣Inter-Faith Forum |
| IFF➣Intergovernmental Forum on Forests |
| IFF➣Information Flow Framework |
| IFF➣Interrupt Flip Flop |
| IFF➣Industrial Funding Fee |
| IFF➣Instituttet for Fremtidsforskning (Danish: Institute for Future Studies) |
| IFF➣Italian Fusion Festival (Dublin, Ireland) |
| IFF➣Institut für Festkörperforschung (German: Institute for Solid State Research) |
| IFF➣Iraq Freedom Fund |
| IFF➣Indice Di Funzionalità Fluviale (Italian: River Functionality Index) |
| IFF➣Inverness Film Fans (Scotland, UK) |
| IFF➣Institut für Fertigteiltechnik (German: Institute of Precast Technology) |
| IFF➣Intrastate Funding Formula |
| IFF➣Illegal Foreign Fisher (Australia) |
| IFF➣Issued for Fabrication |
| IFF➣Information Flow Framework Language |
| IFF➣International Flying Farmers |
| IFF➣Interferon Fibroblast |