| Acronym | Definition |
|---|
| FMS | Fibromyalgia Syndrome |
| FMS | Flexible Manufacturing System |
| FMS | Flash Media Server (Adobe Systems) |
| FMS | Financial Management Service |
| FMS | Foreign Military Sales |
| FMS | Flight Management System |
| FMS | Faculty of Management Studies |
| FMS | Financial Management System |
| FMS | Fresenius Medical Care |
| FMS | Fleet Management System |
| FMS | False Memory Syndrome |
| FMS | Facilities Management Services (State Farm Insurance) |
| FMS | File Management System |
| FMS | Fixed Mobile Substitution (wireless) |
| FMS | Marist Brothers (religious order) |
| FMS | Facility Management System |
| FMS | Fuel Management System |
| FMS | Federal Migration Service (Ministry of Internal Affairs, Russia) |
| FMS | Freeway Management System |
| FMS | Fiji Meteorological Service |
| FMS | Flexible Modeling System |
| FMS | Flight Manual Supplement |
| FMS | Forms Management System |
| FMS | Facilities Management System |
| FMS | Full Mission Simulator (military flight simulator) |
| FMS | Fluid Management System |
| FMS | Field Maintenance Squadron |
| FMS | Fieldbus Message Specification |
| FMS | Federation of Materials Societies |
| FMS | Fault Management System (NEC) |
| FMS | Field Management System |
| FMS | Flexible Machining System |
| FMS | Flight Motion Simulator |
| FMS | Fairfield Middle School (Richmond, VA) |
| FMS | Federal Medical Station (US DHHS) |
| FMS | Facility Management and Safety |
| FMS | Forskningsgruppen För Miljöstrategiska Studier (Environmental Strategies Research Group, Stockholm, Sweden) |
| FMS | Fiscal Management Services |
| FMS | Food Management System |
| FMS | Family Mediation Service |
| FMS | Fédération Mondiale des Sourds (French: World Federation of the Deaf) |
| FMS | Forces Modeling and Simulation |
| FMS | Featherlite Modified Series |
| FMS | Free Monitoring System (Pandora software) |
| FMS | Farnsworth Middle School (Guilderland, New York) |
| FMS | Final Multiple Score |
| FMS | Foothills Middle School |
| FMS | Federal Mortgage Subsidy (IRS deduction) |
| FMS | Fleet Material Support |
| FMS | Floating Machine Shop |
| FMS | Fiber Management System |
| FMS | Fredericksburg Motor Sports (Virginia) |
| FMS | Financial Management Society (Medical Group Management Association) |
| FMS | Fat Mobilizing Substance |
| FMS | Fria Moderata Studentföreningen |
| FMS | Fifteen Mile Stream |
| FMS | Flexent Mobility Server (Lucent) |
| FMS | Feedback Management System |
| FMS | Flow Metering System |
| FMS | Field Middle School (Suffield, OH) |
| FMS | Footprint Magnification System (science fiction) |
| FMS | Forney Middle School (Forney, Texas) |
| FMS | Force Module Subsystem |
| FMS | Frequency Modulation Synthesis (electronic music) |
| FMS | Facility Maintenance Shop |
| FMS | Fair Market Share (economics) |
| FMS | Flush Mounted Spider (oil & gas industry) |
| FMS | Ferndown Middle School (UK) |
| FMS | Fatty Meal Sonography |
| FMS | Firewall Management System |
| FMS | Food Management System/Subsystem |
| FMS | Forest Manor School |
| FMS | Frijoles Mesa Site |
| FMS | Formal Management Systems, Inc |
| FMS | Fuzzy Modelling System |
| FMS | Fort Myers Southern Railway Company |
| FMS | Fusion Management Services |
| FMS | First Module in Shop |
| FMS | Fuse Maintenance Spare |
| FMS | Fachverband der Maschinen und Stahlbau Österreichs (German: Association of Machinery and Steel of Austria) |
| FMS | Flannelmouth Sucker (fish) |
| FMS | Facilities Management Software |
| FMS | Film & Media Studies (various schools) |
| FMS | FashionistaMurderSquad (blog) |
| FMS | Future Memory Solutions (Irvine, CA) |
| FMS | Flow Management System (various companies) |
| FMS | Finnish Missionary Society (now Finnish Evangelical Lutheran Mission) |
| FMS | Fully Managed Service (various organizations) |
| FMS | Fellow of the Institute of Management Services (UK) |
| FMS | Fine-Mesh Screen |