| Fellow of The Securities & Investment Institute | Accounts and Finance |
| Fort Sill (ok) | Airport Code |
| Financial System Inquiry | Business |
| Fellow of the Securities & Investment Institute | Business |
| Financial Services Innovations | Business |
| Foundation Services, Incorporated | Business |
| Flight Service International | Business |
| Freedom Securities Information | Business |
| Free Space Interiors | Business |
| Financial Services Industry | Business |
| Financial Services Inc | Business |
| Financial Secrecy Index | Business |
| Forward Slope Inc | Business |
| Fucshit inc | Business |
| Foundation Systems Inc | Business |
| Financial Soundness Indicators | Business |
| Facility Services Inc | Business |
| Freedom Securities Corporation | Business |
| Failed To Search For Ideas | Business |
| Foam Supplies Inc | Business |
| Frozen Specialties Inc | Business |
| Funeral Services Inc | Business |
| Falmouth Scientific Inc | Business |
| Filter Specialists Inc | Business |
| Fultz and Son Inc | Business |
| Flanders Scientific Inc | Business |
| Final State Interactions | Chemistry |
| Frontier School of Innovation | Community |
| Free Standing Insert | Community |
| Foreign System Interface | Computing |
| File Set Index | Computing |
| Future Store Initiative | Computing |
| Fluid?tructure interaction | General |
| Fluid?tructure interactions | General |
| Flexible Solutions Internationa | General |
| Fraud Scene Investigator | General |
| Fragile States Index | General |
| Fred Sues Irma | General |
| Fluid Structure Interaction | General |
| Free Standing Inserts | General |
| Flashbased Singlesource Image | General |
| Fuel Stratified Ignition | General |
| Farm Shop Inc | General |
| Florida State Invitational | General |
| Fatal And Serious Injury | General |
| Frame String Interaction | General |
| For As In | General |
| Flame Spread Index | General |
| Floriculture Sustainability Initiative | General |
| Flamey Simm Incident | General |
| Flash System Integration | General |
| Fit Strong and Independent | General |
| Ford Scene International | General |
| Fluid–structure interactions | General |
| Fuel Straight Injection | General |
| Frontiers of Science Institute | Governmental |
| Foreign Services Institute | Governmental |
| Fuel Stratified Injection | Governmental |
| The Foreign Service Institute | Governmental |
| Food Safety Initiative | Governmental |
| Food Safety Initiative (CFSAN) | Governmental |
| Foreign Service Institute | Governmental |
| Florida Space Institute | Governmental |
| Faculty Summer Institute | Governmental |
| Freeman Spogli Institute | Governmental |
| Financial Services Institute | Governmental |
| Freshman Scholars Institute | Governmental |
| Fire Service Institute | Governmental |
| Financial Stability Institute | Governmental |
| Functional Strength Institute | Governmental |
| Forest Survey of India | Indian Ministry of Environment |
| Federaci? Social Independiente | International |
| Flexible Solutions International | International |
| Fulfillment Strategies International | International |
| Fire Safety International | International |
| Federación Social Independiente | International |
| First Subject In | Medical |
| Fluid Solid Interaction | Physics Related |
| Floor Space Index | Real Estate |
| Final Systems Installation | Space Science |
| Football Streaming Information | Sports |
| Football Science Institute | Sports |
| Henry Post Army Airfield | Transport & Travel |
