All that had been done in the mid-twentieth century on “calculating machines” had been upset by Robertson and his positronic brain-paths. The miles o… - Isaac Asimov

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All that had been done in the mid-twentieth century on “calculating machines” had been upset by Robertson and his positronic brain-paths. The miles of relays and photocells had given way to the spongy globe of plantinumiridium about the size of a human brain.