A mouse, along with the keyboard, is one of the two main input devices used by computers. It is a small handheld device that tracks the user's motion and is used for moving the cursor on the screen. It also has buttons that are used for clicking and right-clicking objects.

While early mice used a mouse ball to track the movement of the mouse, modern mice use a beam of light or an actual laser. This optical technology is more accurate than the rolling ball method and also keeps mice from getting dirty inside.

Updated: June 18, 2009