this post was submitted on 06 Oct 2023
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An imperial unit (let's remember we got this from the Brits who now say they're metric... but are they?) is generally based on something in day-to-day life so they're relevant. They would have probably been named in the late 40's or early 50's. So I suspect the they'd be based on ways data was transmitted then.
edit: fixed my maths
Aren't morse characters are 1 to 3 taps long?
It's 1 to 4 for the English alphabet, though only E is a 1 tap. I started with 3 taps = 1 character but then all the whole number in my examples go away.
Letters are 1-4, numbers are 5 taps
Ah, my mistake