WHY are the symbols for power on / off “|” and “◯”?

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What are/were they meant to represent? When were they introduced? I can’t find any consistent reliable sources. I’d really appreciate references if anyone has any!

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Anonymous 0 Comments

Think of it as 1 and 0 can be seen as a true/false of “is there power here?” “There isn’t any power, so 0 power”

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