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switches - What is the origin of on and off power switch symbol? - Electrical Engineering Stack Exchange
https://electronics.stackexchange.com/questions/43279
electronics.stackexchange.comWhat is the origin of on and off power switch symbol?I know I (line) and O (circle) symbols are used to specify a switch that turn on and off the power supply.
My question is What is its origin?
Because I thought that it represent a power line that...