The power button symbol is based on binary

The power button symbol is based on binary’s

The power button symbol is based on binary’s off(0) and on (1).

A power-on symbol (line), appearing at one end of a button or toggle switch, shows that the control holds the device in a fully operated position.

The power-off symbol (circle) on a button or toggle indicates that using the control will disconnect the power to the device.

If you know the binary number then you must have understood.

Next Fact: The first iPhone did not have an App Store.

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