magnetic core

from WordNet (r) 3.0 (2006)
magnetic core
    n 1: (computer science) a tiny ferrite toroid formerly used in a
         random access memory to store one bit of data; now
         superseded by semiconductor memories; "each core has three
         wires passing through it, providing the means to select and
         detect the contents of each bit" [syn: {core}, {magnetic
         core}]
    

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