FSB

• Federal savings bank, a class of bank in the US
• Federation of Small Businesses, a British lobbying group
• Financial Services Board (South Africa), a financial regulatory authority
• Financial Stability Board, an international group of financial authorities
• First Somali Bank, a bank headquartered in Mogadishu, Somalia
• FöreningsSparbanken, former name of the retail banking group Swedbank

• Farmer School of Business, at Miami University, Ohio, US
• Friends School of Baltimore, a Quaker institution in Baltimore, US
• Fuqua School of Business, at Duke University, North Carolina, US

• Federal Security Service (Russian: {{lang|ru-Latn|Federal'naya Sluzhba Bezopasnosti}}), the principal security agency of the Russian Federation
• Trade Union Social Citizens List (Danish: {{lang|da|Faglig Social Borgerliste}}), a Danish political group
• Bolivian Socialist Falange (Spanish: {{lang|es|Falange Socialista Boliviana}}), a Bolivian political party

• Fire support base, a temporary military encampment
• Forward support battalion, a former unit of the US Army

• Brinjal fruit and shoot borer (Leucinodes orbonalis), a moth species
• Fast syndrome-based hash, cryptographic hash functions
• Front-side bus, a computer communication interface

• FSB (band), a Bulgarian band
• Fellow of the Society of Biology, UK
• Fishbourne railway station (station code), in England
• Fortune Small Business, a defunct magazine

{{disambiguation}}