Why is it called "booting up" or "rebooting"? I actually knew this. Hell, I'm old experienced enough to remember IBM mainframe systems and their peripherals systems doing (the analogous) IPL (Initial Program Load) (and not to be confused with the even more low-level IML, or Initial Microcode Load).
Why Is It Called “Rebooting”?
You hear the phrase all the time when you’re working with computers, especially on customer service calls: “Please reboot your computer.” Why do we use the word reboot to mean “turn it off and on again”? It all goes back to tech history — and to one of the most revolutionary aspects of these computing machines.
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I was surprised you linked to this. It's old hat for you and me, but I guess it's no longer common knowledge.
It was kind of freaky how some of those old programs loaded. Felt like hoodoo back than.