FSI

FSI may refer to:

Economics

• Financial Secrecy Index, a ranking of secrecy jurisdictions
• Financial Stability Institute, a body of the Bank for International Settlements

Government and politics

• Federation of Italian Socialists (Italian: Federazione dei Socialisti Italiani), a defunct political party of Italy
• Foreign Service Institute, of the United States government
• Foreign Service Institute, India, an agency of the Indian government
• Forest Survey of India
• Fragile States Index, a country ranking method
• Internal Security Forces (French: Forces de Sécurité Intérieure), the national security force of Lebanon

Technology

• Flame spread index
• Fluid-structure interaction
• Frequency scanning interferometry
• FRISK Software International, an Icelandic antivirus software developer
• FSI International, an American equipment manufacturer
• Fuel stratified injection
• Full spectral imaging

Other uses

• Fédération Ivoirienne du Scoutisme, the Ivorian Scouting Federation
• Ferrovie dello Stato Italiane, the Italian state-owned railway company
• FlightSafety International, an American aviation training provider
• Floor space index
• Florida Space Institute, of the State University System of Florida
• FontShop International, a German type foundry
• Fox Sports International
• Freeman Spogli Institute for International Studies, at Stanford University
• Free Sons of Israel, a fraternal organization
• Henry Post Army Airfield, in Fort Sill, Oklahoma, United States
• Italian Chess Federation (Italian: Federazione Scacchistica Italiana)