XYZ (computer)

XYZ was the first Universal Digital Machine from the family of early computers built and launched in Poland in 1958.

XYZ was a laboratory model of a utility machine; the ZAM-2 [pl] series was created on the basis of this computer.

[1] 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.

[citation needed] The machine initially had no permanent memory, only RAM based structurally on ultrasound delay in a mercury-filled tubes.

It was later expanded with a drum memory, an input-output system implemented through a primitive control console and a card reproducer (later a tape reader/perforator).