Soviet Union: Glossary Abbreviations CPSU = Communist Party of the Soviet Union USSR = Union of Soviet Socialist Republics SSR = Soviet Socialist Republic A-UCP(B) = All-Union Communist Party (of Bolsheviks) A-ULCLY = All-Union Lenin's Communist League of Youth Last updated on: 25 Jun 2009 20:00:00; URL: www.archontology.org/nations/ussr/01_glossary.php