Computer mice
A computer mouse is a pointing device that interacts with a user interface to allow navigation. It consists of a 3-elementoved body, a scrollwheel (used to scroll through windows), and two buttons. Optical mice are the most common type used today. They connect to the USB port and send movement data as infrared light. Touchpad mice use touch sensors located near the finger tips instead of buttons. These mice can be used in laptop computers, but are more commonly found on portable computers.
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Pointing devices
A pointing device or pointer is an input device consisting of one or more fingers or a specially designed penlike object that allows users to interact with a computer's display by positioning their cursor onscreen. There are many types of pointing devices, including trackballs, graphics tablets, touchpads, and d-pads. A scanner also falls into this category because it accepts paper input and outputs image data for