The Great Soviet Encyclopedia, also known as Bolshaya sovetskaya entsiklopediya (Большая советская энциклопедия) in Russian, is a vast and extensive encyclopedia in the Russian language. It was published by the Soviet state from 1926 to 1990, making it one of the largest and most comprehensive Russian language encyclopedias in the world.

With 95,267 articles, the Great Soviet Encyclopedia covers a wide range of topics, from history to science to art. The program offers a Favorites feature, allowing users to easily access their preferred articles. Additionally, the History of queries is sorted by time and frequency, allowing users to quickly find previously searched topics. The program also has a convenient Search for word from the clipboard feature that automatically searches for a word copied to the clipboard when the program starts.