"Great Soviet Encyclopedia (YAT)" is one of the largest publications of the last century, which was part of the gold fund of Soviet science and culture. This encyclopedia was created collectively and combined knowledge from various scientific fields: history, literature, art, philosophy, technology, natural science and many others. In its ten volumes, the "Big Soviet Encyclopedia" contained thousands of articles describing facts, events, phenomena, concepts and terms that reflected the scientific achievements of its time. Each volume of the "Great Soviet Encyclopedia" was published in a high-quality design, with many illustrations, diagrams and tables that helped to better understand the material. This publication became an integral part of the library of every educated family, it was used both at home to obtain information and in educational institutions for in-depth study of scientific materials. The "Great Soviet Encyclopedia" is not only an extremely important source of knowledge, but also a kind of cultural symbol of the Soviet era, which was marked by broad general education and great interest in science and culture.