The Very Early Days Of CAD

I’ve been looking at computer graphics and engineering CAD systems for most of my life.  I’ve been a more or less continuous user of CAD systems for over thirty years now and I thought I knew most of how it came about.  There have been things I never really understood about how the way things worked in CAD as opposed to how a designer or drafter thinks, but I didn’t think to look into that very deeply.

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