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.

People are only just discovering the 'hidden symbol' on Elon ... The letter T clearly is a nod to the name but it also said to ... or a power line, or a battery in an electrical ...

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.