| Freshman Research Immersion | Academic & Science |
| Freshman Research Initiative | Academic & Science |
| Fast Research Interface | Academic & Science |
| Fractionation Research Inc | Academic & Science |
| Freshmen Research Immersion | Academic & Science |
| Foundational Research Institute | Academic & Science |
| Florida Research Instruments | Academic & Science |
| Finance Risk Institute | Business |
| Full Repairing And Insuring | Business |
| Finbar International Ltd | Business |
| Forest Research Institute | Community |
| Farm Radio International | Community |
| Fast Rate Input | Computing |
| Flexible Rate Interface | Computing |
| Fire Rescue International | General |
| Food Research Institute | General |
| Final Random Inspection | General |
| Florida Radiology Imaging | General |
| Fuel Revenue Indexing | General |
| Fire Return Interval | General |
| For Real Indulgence | General |
| Flood Risk Index | General |
| Federal Rushers intelligence | General |
| Facility Reported Incidents | General |
| Functional Reading Independence | General |
| Fourniture Robinetterie Industrielle | General |
| Freiburger Rockmusiker Initiative | General |
| Fiscal Rule Index | General |
| Formula Renault Interprovencial | General |
| Federation Routiere Internationale | General |
| Full-Car Roughness Index | General |
| Fully Repairing And Insuring | General |
| Florida Reading Initiative | General |
| Forced Resignations Incorporated | General |
| Fellow of Royal Institution | General |
| Fellow of the Real Estate Institute | General |
| Fisheries Research Institute | Governmental |
| Fujitsu Research Institute | Governmental |
| Financial Research Institute | Governmental |
| Fuerza de Reacción Inmediata | International |
| Fluorescence Reflectance Imaging | Medical |
| Framingham Risk Index | Medical |
| Frontline Readiness for Implementation | Medical |
| Family Relationships Index | Medical |
