"Greater Soviet Encyclopedia" (OG) is the largest and most authoritative publication that was created in the USSR with the aim of enriching the knowledge of the Soviet people. It was published in 65 volumes with more than 100,000 articles on various aspects of life, culture, science, technology and history. The encyclopedia presents extensive information about geography, languages, literature, art, technology and many other fields of knowledge. Its authors are leading scientists, writers, cultural experts of the Soviet Union. "Greater Soviet Encyclopedia" became a real treasure for everyone who sought to expand their knowledge of the world and history, contributed to the formation of a conscious citizen.