What Is a Power Button and What Are the On/Off Symbols?

A power button turns an electronic device on or off. A hard power button visually indicates when something is on or off, unlike a soft power button.

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The power button logo IS 301 at Nevada State College

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Power symbol - Wikipedia

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On Off Symbol

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What Do Power Button Symbols Mean?

Why are the symbols (I /O) used for on and off in many electronics? The I and O are just examples for the “line” and “circle” I usually see. - Quora