Fabryka Samochodów Osobowych (English: Passenger Automobile Factory), commonly known as FSO, was a Polish automobile manufacturer, located in Warsaw. In 2011 the factory ceased production of cars as a result of the global crisis and the entry into force of the Free Trade Treaty, as a result of which cars imported from South Korea into the EU are exempt from 1% duty; since then, FSO has been dealing with, among others production of automotive subassemblies.