Editing Setun (section)

==Overview==
The computer was built to fulfill the needs of Moscow State University. It was manufactured at the [[Kazan]] Mathematical plant. Fifty computers were built from 1959 until 1965, when production was halted. The characteristic operating memory consisted of 81 words of memory, each word composed of 18 [[Ternary numeral system|trits]] (ternary digits) with additional 1944 words on [[Drum memory|magnetic drum]] (total of about 7&nbsp;KB).<ref>{{cite web|url=https://www.computer-museum.ru/articles/setun-i-setun-70/|title=ЭВМ ''Сетунь''|last=|first=|date=|website=Russian Virtual Computer Museum|language=Russian|trans-title=''Setun'' computer|archive-url=|archive-date=|access-date=September 20, 2016}}</ref> Between 1965 and 1970, a regular binary computer was used at Moscow State University to replace it. Although this replacement binary computer performed equally well, it was 2.5 times the cost of the Setun.<ref name="Brousentsov">{{cite web |url=https://www.computer-museum.ru/english/setun.htm |title=Development of ternary computers at Moscow State University |last1=Brousentsov |first1= N. P. |last2=Maslov |first2= S. P. |last3=Ramil Alvarez |first3=J. |last4=Zhogolev |first4= E. A. |website=Russian Virtual Computer Museum |accessdate=January 19, 2015}}</ref>

In 1970, a new ternary computer architecture, the [[Setun-70]], was developed. [[Edsger W. Dijkstra]]'s ideas of [[structured programming]] were implemented in the hardware of this computer. The short instructions set was developed and implemented by [[Nikolay Brusentsov]] independently from [[Reduced instruction set computer|RISC architecture]] principles.<ref name="Brousentsov"/>

The Setun-70 hardware architecture was transformed into the Dialogue System of Structured Programming (DSSP). DSSP emulates the "Setun 70" architecture on binary computers, thus it fulfills the advantages of structured programming. DSSP programming language has similar syntax to the [[Forth (programming language)|Forth]] programming language but has a different sequence of base instructions, especially conditional jump instructions. DSSP was developed by Nikolay Brusentsov and doctoral students in the 1980s at [[Moscow State University]]. A 32-bit version was implemented in 1989.