XYZ

XYZ was the first Universal Digital Machine from the family of early computers built and launched in Poland in 1958. It was ahead of by a few months, while the earlier was not fully launched. Construction XYZ computer was built and launched in Warsaw at ul. Śniadeckich 8, at the premises of the Bureau of Calculations and Programs of the Mathematical Apparatus Department of the Polish Academy of Sciences (later the Institute of Mathematical Machines). The team was led by professor . XYZ was a laboratory model of a utility machine; the series was created on the basis of this computer. The logical organization was modeled on the simplified IBM 701, but the electronics were based on the dynamic flip-flops of the M-20 machine, requiring twice as few lamps. The design of the flip-flops and gates was derived from EMAL, but the vacuum diodes were replaced with germanium ones. The working memory was also derived from the EMAL machine after the improvement. It was a dynamic serial computer that computes in binary arithmetic.