Over the next few years CDC sold a small number of the Digigraphics systems, first to aerospace companies including Lockheed and Martin Marietta, and later to the US Navy, who was interested in using them for submarine design.
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Originally developed at Itek on the PDP-1 as EDM (Electronic Drafting Machine), the efforts were purchased by Control Data Corporation and ported to their machines, along with a new graphics terminal to support it.