UMC (Uniwersalna Maszyna Cyfrowa - Polish for Universal Digital Machine) is a family of computers produced by

Elwro Elwro was a Polish company that manufactured mainframe and microcomputers from 1959 until 1989. Its plant was in Wroclaw. Computer models included Odra mainframe systems, and the Elwro 800 Junior microcomputer for education. Overview The Wroc ...

from 1962. It consisted of vacuum-tube based UMC-1 and

transistor upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch ...

-based UMC-10 (1964). UMC computers operated using negabinary (-2 base)

numeral system A numeral system (or system of numeration) is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symb ...

invented by prof.

Zdzisław Pawlak Zdzislaw I. Pawlak (10 November 1926 – 7 April 2006) was a Polish mathematician and computer scientist. He was affiliated with several organization, including the Polish Academy of Sciences and the Warsaw School of Information Technology. H ...

References

Early computers {{compu-hardware-stub