Push-button

1. When referring to software, a button, or push-button, is a graphical representation of a button that performs a specific action when pressed. For example, when a user closes a file, he or she may see a dialog box with a prompt if they wish to save the file and have the option to press the push-button for Yes, No or Cancel. Below is a visual example of a button.

2. When referring to hardware, a button is a physical button on a hardware device. For example, the button on the front of your computer monitor used to turn the monitor on and off is an example of this button.