1. Nikolay Petrovich Brusentsov By: Brianna M. Johnson

2. Contribution to Computer Science He is most famous for having built “Setun,” a balanced ternary computer with Sergei Sobolev in 1958. The world’s only ternary computer built by hand.

3. Early Life Born: Feb. 7, 1925 in Kamenskoe [Ukrainian SSR] Family: Father died while young, had a mother and 2 younger siblings Liked to play music, was not that good Major Event: World War II in 1940s Made to move to Orenburg (South Urals) with his family and the plant that his mother worked for. Worked as a turners apprentice and went to night school

4. Military Career Drafted into military in February 1943 Worked as a radio operator Assigned to 154 th infantry Received the medal of honor and the Order of the Red Star for his combat services Graduated from the 10 th division with excellent marks in 1947

5. Mid-life and Sobolev Finished the Radio Department of the Moscow Energy Institute in 1953 – Created tables of diffraction on an elliptical cylinder Took a job at Moscow University with Sergei Sobolev With Sergei and a team, Nikolay began work to build a computer for lab use in the university. – This computer had to be smaller for lab use, cost, and reliability.

6. The beginning of Setun Nikolay was appointed head over the new computer build. This computer would have a binary system of calculation on magnetic elements – Not Tubes! Nikolay decided to make a change and use a trinary/ternary (0,1,2 instead of just 0,1) system for his calculations. – Allowed him to use less elements (save money) It also used a magnetic drum for paging and two- level memory.

7. The beginning of Setun After hearing of Nikolay’s intentions of creating a computer using a ternary system, Sergei hired several assistants for the project In 1958, Nikolay’s team assembled the first model of the trinary computer with their own hands.

8. Setun and Setun 70 The computer was named after the river “Setun” near Moscow University. The Setun model was ordered to be mass produced by the SSR Cabinet of Ministers by the Kazan Mathematical Machines plant. – Although no interest kept up production of this ternary computer In 1961-1968 Nikolay and Zhogolev improved Setun and called it Setun 70 – Setun 70 had a two-stake architecture and used POLIS or Polish inverse notation

9. Continuation of Modification of Setun 70 1971- Edsger Dijkstra: modified the basis of structured programming – This helped Setun’s procedural language – Setun 70 now had a Dialog System of Structured Programming (DSSP) – After the creation of Setun 70, Nikolay’s Laboratory was driven out of the MSU building.

10. The End of Setun’s Era This caused the original Setun to be destroyed. – Setun had operated consistently for 17 years. – It was taken to a garbage dump after it had been cut into small pieces. Setun 70 would be was saved for the university attic – It was used for the creation of Nastavik.

11. The rest of his life 89 years old Manages the computer laboratory of the Computing Mathematics and Cybernetics Department at Moscow State University Nikolay published over 100 scientific works Created 11 inventions Awarded the Sign of Honor Order, the Large Gold Medal of the Soviet Union National Exhibition, and the Laureate fo the USSR Council of Ministries

12. Sources http://www.icfcst.kiev.ua/MUSEUM/Brusentsov.h tml http://www.icfcst.kiev.ua/MUSEUM/Brusentsov.h tml http://ternary.3neko.ru/photo.html http://en.wikipedia.org/wiki/Nikolay_Brusentsov http://www.computer- museum.ru/english/galglory_en/Brusentsov.htm http://www.computer- museum.ru/english/galglory_en/Brusentsov.htm http://www.sigcis.org/files/sigcismc2010_001.pd f http://www.sigcis.org/files/sigcismc2010_001.pd f