While the power symbol made it into Unicode in 2015, it's been around for much longer. The goal in moving it to Unicode was to add a crucial symbol used around the world by the masses.

The power symbol, which can still be seen on nearly all modern PCs and laptops, originated in the 1950s. At the time, devices were still operated using physical switches that had “on” and ...

The power symbol is expressed in several ways, but most people are likely familiar with the circle that has a line extending from its center, breaking its border to the top.