Setun-70

Setun-70 was an experimental Soviet ternary computer developed at Moscow State University (MSU) between 1967 and 1970 by Nikolay Brusentsov and Yevgeny Zhogolev. Conceived as the successor to the original Setun of 1959, it abandoned the single-address accumulator design of its predecessor for a two-stack stack machine architecture whose instruction set was organized around variable-length 6-trit trytes.