the power symbol was born: a large circle (0) interrupted by a small vertical line (1). This language-agnostic design was ...

A circuit has to have a power source and that is often a cell ... to draw the + and – symbols but they can be helpful. The switch symbol (off) has a line at an angle to show the circuit has ...

They wrote: "Ever wonder what those symbols on power switches and buttons mean ... For those with a Sky remote, you can switch from Bluetooth to infrared. All Sky remotes use Bluetooth by ...