| Acronym | Definition |
|---|
| IOF | Iron Ore Fines |
| IOF | Institute of Fundraising (UK) |
| IOF | International Osteoporosis Foundation (Switzerland) |
| IOF | Imposto Sobre Operacoes Financeiras (Brazil) |
| IOF | International Orienteering Federation |
| IOF | Institute of Finance (various organizations) |
| IOF | Israeli Occupation Force |
| IOF | Industries of the Future (various locations) |
| IOF | Inter Office Facility |
| IOF | Input Output Facility |
| IOF | Instant on Fusing |
| IOF | Input Output File |
| IOF | Interactive Output Facility |
| IOF | Institute for Applied Optics and Precision Engineering |
| IOF | Independent Order of Foresters |
| IOF | Institute of Forestry (Nepal) |
| IOF | Investor-Oriented Firm |
| IOF | Initial Operating Facility |
| IOF | Interactive Output Facility (US FEMA) |
| IOF | Interim Operating Facility (US FEMA) |
| IOF | International Oceanographic Foundation |
| IOF | International Operation Forces (gaming clan) |
| IOF | Indonesian Offroad Federation |
| IOF | International Order of Foresters |
| IOF | Inter Office Facilities |
| IOF | I'm on Fire! (gaming) |
| IOF | Infrared Optical Film |
| IOF | Investment Opportunity Facility |
| IOF | Indian Ordnance Factory (arms producer) |
| IOF | International Osprey Foundation |
| IOF | International Olympic Federations |
| IOF | Inspection Observation Finding |
| IOF | Intelligence and Operations Facility (digital command post) |