Button
1. When referring to
hardware, a button is a physical switch that controls a function of a device.
In the picture to the right, is an example of the power button found on the front of a computer, which turns it on and off.
2. When referring to software, a button is what controls a feature in software. See the push-button dictionary definition for further information and an example.
Also see: Depress, Mouse button, Office button, Power definitions, Push-button, Reset button, Turbo button