The exposition welcomes the visitors with a real african signal tom-tom and provides the entire history of communication technology from the oldest means such as tom-toms through the first telephones and telegraphs to the most modern devices used for transmission of sound and video using electromagnetic waves. The exhibits are sequenced chronologically, accompanied by a short description and commentary regarding their function. Programs in the “multi-media hall” ensure a unique experience. There are several interactive models that can help the visitors imagine practical usage of older communication devices. Czechoslovak products regarding communication technology are presented which enables visitors to get to know principles used in history and admire a creative work of our forefathers.