Elektronika 60

It is a rack-mounted system with no built-in display or storage devices.

The main logic unit is located on the M2 CPU board.

As an unlicensed clone implementation of the DEC PDP-11/23, the Elektronika 60 is generally software-compatible, could use much of the same peripherals, and physically resembles that model.

The original implementation of Tetris was written for the Elektronika 60 by Alexey Pajitnov in 1985.

[1] As the Elektronika 60 does not have raster graphics, text characters were used to form the blocks.