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Setun – Wikipedia, the free encyclopedia
Setun (Russian: Сетунь) was a balanced ternary computer developed in 1958 in Russia. It was one of the first practical ternary computers, using three-valued ternary logic instead of two-valued binary logic prevalent in computers before and after Setun’s conception.

It was developed at Moscow University. The computer was manufactured by the Kazan Mathematical plant. 50 computers were built.