FSI

FSI is a three-letter abbreviation with multiple meanings, including:

• Foreign Service Institute, U.S. Department of State, the primary training facility for American Foreign Service Officers
• Foreign Service Institute India in New Delhi, India, the Institute for training of Indian Foreign Service Officers
• Failed States Index, a country ranking method
• Federazione Scacchistica Italiana, the Italian Chess Federation
• Financial Services Industry
• Financial Services Institution
• FlightSafety International, an aviation training provider
• Floor Space Index, the ratio of total floor space to plot size
• Flame Spread Index, a measure for how fast flames spread in a material.
• Fluid-structure interaction, a phenomenon that occurs when a fluid interacts with a solid structure
• FontShop International, a digital type foundry
• Freeman Spogli Institute for International Studies, Stanford University's primary forum for interdisciplinary research on key international issues and challenges.
• Frequency Scanning Interferometry, an interferometric method of distance measurement
• FRISK Software International, an Icelandic antivirus software developer
• Fuel Stratified Injection, a type of gasoline direct injection petrol engine made by Volkswagen Group