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

It’s simply from the binary system from the late 1600’s that computers was built on in the 40’s. You have 1s and 0s, 1 meaning ON and 0 is OFF.

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