Description

Flat square with copper wires strung top to bottom; left to right. Plaque reads: "Internal Message Storage Plane // Memory Test Computer".

The magnetic core memory, invented by Jay Forrester, consisted of doughnut-shaped ferrite rings strung on fine wires. This memory system, containing over 1000 tiny magnetic cores, could take in or give out a piece of information in less than eight millionths of a second. Patent information can be researched at Institute Archives.