> In the drawing office of a radio factory in 1961 all circuit diagrams
> were hand drawn for production, test and service manuals.
> There were no rectangles.

Same when I started my apprenticeship in new Zealand, in 1969. They were
still hand drawn 10 years later and PCBs laid out with real tape,
although I suspect by then any large company in the USA would have had
CAD systems for both functions.
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