This whole thing is very cool and worth reading.
BUT. I worked at a place that used IBM 360s. We ran stuff for engineers, a lot of Fortran along with assembly code. We had so much stuff going on we could not code up and run things fast enough. The engineer/scientist got frustrated.
Then one day an engineer brought in an Apple II from home and ran the programs on that.
The earth shook. The very ground beneath us moved. Tectonic plates shifted. The world was never the same again! I think it was Visicalc.
Later there were other things. Soul Of A New Machine. The Mac.
I wonder how the compute power of a current high end smart phone compares with and IBM 360? I know the graphics chip is better.
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