A computer mouse is a portable pointing device used with a computer. The cursor moves on the screen, allowing transparent control of the graphical interface and you can move and choose texts, icons, files and folders on the computer. Moving the mouse over a flat surface can move the pointer to different parts of the screen. A mouse typically has two buttons: a primary button (usually the left button) and a secondary button (usually the right button). The Home button is the button you will use most often. Most mice also include a scroll wheel between buttons to help you scroll through documents and web pages more easily.