FSM may refer to:

Government

• Free school meals, a social program
• Macau Security Force, Macau's public security body
• Submarine forces (France) (French: Forces sous-marines), a component of the French Navy

Media and entertainment

• FIFA Soccer Manager, a video game
• Fighting Spirit Magazine, a professional wrestling magazine
• Film Score Monthly, an online magazine and former record label
• Free Software Magazine, an American online computer magazine
• Fox Sports Midwest, now Bally Sports Midwest, an American television channel

Organizations

Business

• Fabryka Samochodów Małolitrażowych, a Polish automotive company
• Fenway Sports Management, an American sports marketing agency
• Five Seven Music, an American record label
• Fine Scale Miniatures, a defunct model railroad producer
• Fortuna Silver Mines, a Canadian mining company
• Franklin & South Manchester, a model railroad producer
• Free Spirit Media, a mass media company in Chicago, Illinois, United States
• Fuel Supplies Maldives, a subsidiary of the State Trading Organization of the Maldives

Education

• Fanattic Sports Museum, a sports museum in Kolkata, India
• Feinberg School of Medicine, at Northwestern University, Chicago, Illinois, United States
• Fiji School of Medicine, a tertiary institution based in Suva, Fiji
• Friends School of Minnesota, a primary school in Saint Paul, Minnesota, United States
• Frost School of Music, at University of Miami, Florida, United States

Politics

• Federation of Socialist Youth, a former socio-political organization in Russia
• Five Star Movement, a political party in Italy
• Madrilenian Socialist Federation (Spanish: Federación Socialista Madrileña), the branch of the Spanish Socialist Workers' Party in Madrid, Spain
• Mauritian Solidarity Front (French: Front Solidarité Mauricien), a political party in Mauritius
• Socialist Federation of Martinique (French: Fédération socialiste de Martinique), a political party in Martinique

Other

• Football Association of Macedonia (Serbian: Fudbalski Sojuz na Makedonija), now called the Football Federation of Macedonia
• Foundation Secours Mondial, a defunct American charity organization
• Franciscan Sisters of Mary, a religious congregation in St. Louis, Missouri, United States
• Friends of Science in Medicine, an Australian health organization

Places

• Federated States of Micronesia, an island country in Oceania
• Fatih Sultan Mehmet Bridge, in Istanbul, Turkey
• Fort Smith Regional Airport, in Arkansas, United States
• Fred and Sara Machetanz Building, at Matanuska–Susitna College in Palmer, Alaska, United States

Religion and philosophy

• Flying Spaghetti Monster, the deity of Pastafarianism
• Field Staff Member, a position at the church of Scientology

Science and mathematics

• Fast sweeping method, in applied mathematics
• Finite-state machine, in computer science
• Force spectrum microscopy, in physics
• Folded spectrum method, in mathematics
• Free-surface modelling, in physics
• Frequency specific microcurrent, in pseudoscience
• Samarium monofluoride, by its chemical formula (FSm)

Technology and management

• AN/FSM, a series of electronics employed by the United States military
• Factory service manual, a type of guide for technical products
• Fast steering mirror, a mirror used in optics to compensate for tilt
• Fecal sludge management, in sanitation
• Field service management, in business management
• First surface mirror, a type of mirror
• Fixed Survey Meter, a radiation detector
• Flail space model, in transportation safety
• Free software movement, a technology-related social movement
• FSM100xx 5G Modem, a modem manufactured by Qualcomm
• Functional Service Module, a propulsion module on the Soviet space station module Kvant-1
• Functional size measurement, a software business functionality metric developed by IFPUG
• Functional sizing method, an approach to software sizing

Other uses

• Free Speech Movement, a student protest movement in the United States
• Food Safety System Manager, a profession designation of the European Organization for Quality