Wikipedia
Rabkrin
Rabkrin, RKI or Workers' and Peasants' Inspectorate (WPI) ( Russian: Рабо́че-крестья́нская инспе́кция, Рабкри́н, РКИ) was a governmental establishment in the early Soviet Union responsible for scrutinizing the state, local and enterprise administrations from 1920 to 1934.