Do You Know What Does This Symbol On Every Gadget’s Power Button Mean?

The story of this symbol goes far back to World War 2 when engineers used the binary system to label power button.
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In binary systems, 1 means “on” and 0 mean “off.”
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Image via Devianart

Finally in 1973, it was standardized by International Electrotechnical Commission, IEC as a power button symbol.
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Image via pcper

You may have seen these power button too. Here we have to toggle between on and off, that’s why – there are different I and O.
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Image via dribbbble

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