Electronika 60
The Electronika 60 () is a computer made in the Soviet Union by Elektronika in Voronezh.

Overview
Alone the Electronika 60 is a rack-mounted computer with no built-in display or storage devices.  It was usually paired with a 15IE-00-013 terminal and I/O devices. The main logic unit is located on the M2 CPU board.

M2 CPU Technical Characteristics:
 LSI-11 (PDP-11 LSI CPU implementation) clone
 Word length: 16 bits
 Address space: 32K words (64 KB)
 RAM size: 4K words (8 KB)
 Number of instructions: 81
 Performance: 250,000 operations  per second
 Floating-point capacity: 32 bits
 Number of VLSI chips: 5
 Board dimensions: 240 × 280 mm

The original implementation of Tetris was written for the Electronika 60 by Alexey Pajitnov. As the Electronika 60 has no graphics capability, text was used to form the blocks.

References

External links
 Article about Electronika-60 in Russian
 Images of the Electronika 60M
 Archive software and documentation for Soviet computers UK-NC, DVK and BK0010

Soviet Union–United States relations
PDP-11
Ministry of the Electronics Industry (Soviet Union) computers