"Big Soviet Encyclopedia" (SV) is a huge and comprehensive reference book on various fields of knowledge, which became a symbol of the development of culture and education in the Soviet Union. In terms of its volume and depth of knowledge, the "Great Soviet Encyclopedia" impresses with its variety of information and accuracy of facts. Each button of this encyclopedia became a source of the most important knowledge in those times, plunging generations into the world of science, history, culture and technology. The "Great Soviet Encyclopedia" not only became the most important source of information in families, but also preserved for descendants a huge stock of knowledge and experience of previous generations.