| Acronym | Definition |
|---|
| OIF | Office for Intellectual Freedom (American Library Association) |
| OIF | Operation Iraqi Freedom |
| OIF | Organisation Internationale de la Francophonie (French: International Organization of Francophonie) |
| OIF | Oman Investment Fund (est. 2006) |
| OIF | Oracle Identity Federation |
| OIF | Optical Internetworking Forum |
| OIF | Osteogenesis Imperfecta Foundation |
| OIF | Ocean Iron Fertilization |
| OIF | Output Interface |
| OIF | Optimum Index Factor |
| OIF | Optimist International Foundation (St Louis, MO) |
| OIF | Object Interchange Format |
| OIF | Oil Immersion Field |
| OIF | Osho International Foundation (Switzerland) |
| OIF | Oil in Frame (motorcycle frame design) |
| OIF | Operations Information File |