IBM magnetic core memory comprising 3 dimensional network of wires with magnetic beads at each intersection, together with a plug-in module, 1950s-1960s.

Physical Description

Module with six frames, each containing a number of tiny magnetic toroids (rings), the cores, through which wires are threaded to write and read information. The top is protected by a perspex sheet and the base of the module is attached to a metal plate. A set of seven cord connectors is attached to the frames. Plug in module containing mechanical and electromechanical components. Some of the components have identifying markings.


Magnetic core memory was the electro-physical mainstay of computers in the early computer era. They had to be hand-assembled.

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