The primary purpose of a computer mouse is to serve as a pointing device that allows users to interact with a computer's graphical user interface (GUI). By moving the mouse across a flat surface, users can control the cursor on the screen, enabling precise selection of items, navigation through menus, and activation of various functions. The mouse typically has buttons (usually two) and a scroll wheel, enhancing usability by allowing quick access to commands and scrolling through documents. Various types of mice exist, including wired, wireless, optical, and laser varieties, each designed to improve user experience and functionality.