In an I/O switch, “I” typically stands for “On” and “O” stands for “Off.” This labeling is common on power switches for electronic devices.
- When the switch is in the “I” position, it closes the circuit, allowing electricity to flow and turning the device On.
- When the switch is in the “O” position, it opens the circuit, stopping the electrical flow and turning the device Off.
This convention is derived from the binary system, where “1” (I) represents a state of activity or power (On) and “0” (O)represents inactivity or no power (Off).