I guess some of this is just in my blood.... my mother was an artist, but when the war began she became a draftsman (draftsperson?) at Curtis Aircraft. That's where she met my father, who was an engineer and subsequently was sent to Guam to maintain airplanes in the Navy. I still have one of my mother's airplane drawings framed on the wall. It was surprising to me, since during my lifetime it was hard to imagine her ever doing anything that technical and nerdy, LOL!
When I was home from school sometime around 1970, my dad was the Chief Design Engineer at McDonnell-Douglas and took me into his office on a weekend morning when it was empty. He had one of his people demonstrate their IBM CAD system, which was probably the most advanced in the country (if not the world) at that time. It had a huge CRT screen and they used a light pen to select and draw. The technology was very different then, it was vector graphics, unlike today's raster graphics. With the vector system, there was a "display file" which was a list of all the points in the drawing. The computer endlessly cycled through that list and re-drew every line once a second. The screen used a special long-persistence phosphor, so that the lines would keep glowing while they were being re-drawn, but you could still see some flicker. This is similar to the way analog radar screens worked.
Anyway, it just blew me away at the time. The system was also linked to computer-machining equipment, so parts could be directly built from the drawings. And another important feature was that it could calculate the optimal routing for the hundreds of thousands of wires and tubes through all the bulkheads in an airplane.
But that terminal was just the tip of the iceberg, there was a big computing center in a building across the campus that did the real work. Out front they had some impressive fountains. These were actually part of the cooling system for the computers! I remember thinking that ordinary people would never have access to anything like this. But in reality, it started happening within ten years with the introduction of the IBM PC and Apple ][ computers in the late 70's!