system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: WHY are the symbols for power on / off "|" and "◯"?

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!
gpt
The International Electrotechnical Commission standards organization define it as open/closed as many others have stated.

The line is on.  The circle is off.

Yes, the numbers 0 and 1 are used for on off sometimes , but the symbol is a line abd circle and they were originally chosen as a language neutral representation for an open and closed circuit.