So many of the symbols and icons ... power symbol was born: a large circle (0) interrupted by a small vertical line (1). This language-agnostic design was meant to convey that a switch or 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 ...

With the General tab selected, look for the Button Labels option and click on Text. Scroll down ... that little gear icon remains a gear. Guess Google thinks that symbol is universally recognized.