What is the full form of USSR?

What is the full form of USSR?

The full form of USSR is Union of Soviet Socialist Republics. It had 15 Soviet Socialist Republics (S.S.R.’s): Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. The capital was Moscow, then and now the capital of Russia.