It looks like I get an A. Make that an A+ as I not only know what an RS-232 cable is, but I used them and repaired them.
I know the tools in the tool case quite well as I've used them for work and not just at home for my own purposes.
To go back a really long ways (for the computer age) I remember when base 2 arithmetic was introduced in the primary grades at school. We were told it was because we were now in the space age and not the iron age. At the time no one (teachers and pupils) knew that the arithmetic was to be the basis on which we were to learn all about computers and computing. Of course at the time computers weighed a few tons, occupied complete rooms, and were only used by big corporations and utility companies.
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