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Setun
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==== Setun-70 computer ==== Between 1961 and 1968, Brusentsov and Zhogolev developed Setun-70, the next generation of Setun computer with a new architecture. It was designed for effective software development, in which the ternary system played a key role. Both addresses and operations are in syllables, where each syllable's length equals to 6 trits (about 9.5 bits). Algebraic expressions of operands by syllables replace the instructions as words in the traditional design, as the instruction set is updated to allow more variance of operand length.<ref name="Brousentsov" /> The algebra is supplemented by testing, control, and input-output operations. The user can add operations on their own without reducing the computer's performance, thus providing the ideal conditions for structured programming. Brusentsov claimed that the programming time on Setun-70 is reduced by five to tenfold with unprecedented reliability, clarity, compactness and speed. The functioning algorithm of Setun-70 was comprehensively described in expanded [[ALGOL 60|Algol-60]].
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