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!
In: 27
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.
Latest Answers