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Parametron: 50s Japanese computer that uses neither transistors nor vacuum tubes
Milestones:Parametron, 1954 Title Parametron, 1954 Citation The Parametron, a logic element using ferrite cores and parametric oscillation, was invented in 1954 by Eiichi Goto at the University of Tokyo. 4,200 parametrons went into the PC-1, Japan’s first university-built stored-program computer which became the nation's then-fastest in 1958.
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