Mapping 'tech' by the 'Domain of Science'

I’ve seen some of these maps before but I don’t think I’ve heard the verbal descriptions:
Map of mathematics
Here’s a list:
I’m not sure the Computer Science one is as good.

My Dad normally bought new. The only time he bought second-hand it was a Mk.2 Escort Popular. The clutch cable broke when I was driving it. He never bought another Ford.

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