FSIN

FSIN may refer to:

• Federal Penitentiary Service (Russian: Федеральная служба исполнения наказаний, romanized: Federalnaya Sluzhba Ispolneniya Nakazaniy), a federal agency of the Ministry of Justice of Russia
• Federation of Sovereign Indigenous Nations, a First Nations organization based in Saskatchewan, Canada
• Frankfurt-Sindlingen station by Deutsche Bahn station code
• Floating-point sine in the x86 instruction set

This disambiguation page lists articles associated with the title FSIN.
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