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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I have not even looked at the comments, but 1 is an ON and 0 is an off, and comes from base 2 Mathematics, in other words Binary. It is the fundamental basic of transistors.
1 – Power applied
0 – Power not applied.
It is how the RAM in your computer works, it is how the CPU works.
Fun fact: if the 1 intersects the 0, it’s a standby power switch, meaning that switch doesn’t completely power off the device. Consequently, if the 1 is inside the circle, that single switch (usually a latching push button) toggles between compete off and compete on.
It’s from binary. It basically represents transistors or logic gates, where when you have a ton of transistors you can manipulate 0 and 1s aka true and false to create complex things by feeding input (electricity) into a circuit and then open and close transistors to get a desired output.
The “I” represents a closed circuit, meaning electricity is reaching the thing it is supposed to be powering, therefore it is ON. The “O” represents an open circuit, meaning the electricity is not reaching the thing it is supposed to be powering, so it is OFF.
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