Russian Soviet Federated Socialist Republic

(Rossiyskaya Sovetskaya Federativnaya Sotsialisticheskaya Respublika--RSFSR). Official name of the largest of the fifteen union republics of the Soviet Union. Inhabited predominantly by Russians, the RSFSR comprised approximately 75 percent of the area of the Soviet Union, about 62 percent of its population, and more than 60 percent of its economic output.