Is there a better way to design switches than I/O?

1. Is I or O on for a switch?
2. What is IO switch?
3. Is 0 or 1 on or off?
4. Is power on line or circle?

Is I or O on for a switch?

On/Off Power Button Symbols (I & O)

Power buttons and switches are usually labeled with "I" and "O" symbols. The "I" represents power on, and the "O" represents power off.

What is IO switch?

The line symbol means “power on” and the circle symbol means “power off”. The presence of both (I/O) on a push button means the switch toggles the power.

Is 0 or 1 on or off?

(1 or | means on.) IEC 60417-5008, the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. (0 or ◯ means off.)

Is power on line or circle?

IEC 60417-5007, the power-on symbol (line), appearing on a button or one end of a toggle switch indicates that the control places the equipment into a fully powered state. IEC 60417-5008, the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device.