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

They are 1 and 0. In computer terms, 0 means little or no energy, and 1 means significant energy. So 1 is positive values, like true, or on, while 0 is negative values, like false, or off.

Most machines are never truly “off” they just go on standby, which is why their symbol looks like a circle with a vertical line through it. Which sorta defeat the purpose of a binary if you introduce “kinda” but there you have it.

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