At which Soviet research center was Pajitnov working when he made Tetris?

Alexey Pajitnov was working at the Dorodnitsyn Computing Center when he made Tetris.

The center was a research institute of the Soviet Academy of Sciences in Moscow, specializing in applied mathematics, computer science, and large-scale scientific calculations. Pajitnov worked there as a speech-recognition and artificial-intelligence researcher, and the institution’s computer equipment gave him a setting in which to experiment with games.

He created the first Tetris prototype on an Elektronika 60, a Soviet computer related to the PDP-11. Its limited display had no modern graphical interface, so early pieces and the playing field were represented with text characters such as brackets and spaces. Pajitnov first developed the game in his spare time, then colleagues including Dmitry Pavlovsky and Vadim Gerasimov helped adapt it for IBM-compatible personal computers.

The center’s name can appear in different forms, including Computing Center of the USSR Academy of Sciences and Dorodnitsyn Computing Centre. Those names refer to the same institution in this historical context. The other listed institutes were Soviet research organizations, but they were not Pajitnov’s workplace when he created Tetris.