OGPU
Formed from the Cheka, the original Russian state security organization, on February 6, 1922, it was initially known under the Russian abbreviation GPU—short for "State Political Directorate under the NKVD of the RSFSR" (Russian: Государственное политическое управление при НКВД РСФСР, "Gosudarstvennoye politicheskoye upravlenie" under the NKVD of the RSFSR"). Its first chief was the Cheka's former chairman, Felix Dzerzhinsky.