Jay Forrester records idea for core memory
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13th June 1949 MIT's Jay Forrester writes an entry in a notebook, dated 13th June 1949, that records his ideas for core memory. Core memory used small rings of magnetic material strung on wires to store data. Each ring can be magnetized in two directions to represent either a one or a zero. Core memory was more reliable, faster, and easier to make than other memory technologies of the time. Manufacting the memory, however, was a delicate job. Thin wires had to be handwoven through tiny holes, a job mostly performed by female workers using microscopes. Core memory remained popular until the development of semiconductors in the 1970s. Related information:
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