It was only recently accepted as a formal “power on/off” button.

You've seen it pretty much every day now for decades, and you've interacted with it just as many times, but have you ever wondered why the power symbol looks the way that it does? There's a joke that ...

This article originally appeared on Motherboard. We touch, hold, long-press or tap this symbol every day—even several times a day—but the power icon has become so ubiquitous that its meaning doesn’t ...