A computer mouse, often called a computer mouse pad, is a small hand-held pointing device typically made of plastic or rubber that recognizes two-dimensional movement relative to a flat surface. This movement is typically interpreted by a computer’s pointing mechanism, which enables a user to smoothly manipulate the user interface of a computer through the use of one or more wheels. A wheel can rotate in one direction or another, and this rotation is detected by a sensor that in turn detects the presence of pressure. This type of input device operates on a similar principle as that of a game controller. A user can rotate his or her hands in any direction, while holding the wheel of the mouse in a constant position relative to the screen.
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