This exhibition of National Technical Museum presents while using breathtaking installation the technology used during totalitarian eras between 1939-1989. We present tools and objects that were used by political regimes as well as the tool used by its opponents to fight for freedom. Among 140 exhibits we can see confiscated items used for trespassing the state borders, tools used by STB (State secret police) for watching regime dissidents or musical tools used by underground bands.