In a computer, mouse is an input device. In 1964 the first prototype computer mouse was made to use with a GUI (graphical user interface) for MS DOS. It has two buttons normally. It also has wheels and it also can another element. We know that, the first publication of the term "mouse" as a pointing device is in Bill English's 1965 publication "Computer-Aided Display Control". Mice(Computer) Patent # 3,541,541 issued 11/17/70 for X-Y Position Indicator For A Display System(G.U.I) .
Some systems allow two or more mice to be used at a time. Microsoft Windows 98 to now her any operating system, has supported multiple simultaneous pointing devices.
Mouse is a common pointing device The basic features of a mouse are a casing with a flat bottom, designed to be gripped by one hand; one or more buttons on the top; a multidirectional detection device on the bottom; and a cable connecting the mouse to the computer. The ball mouse (computer) has two freely rotating rollers. They are located 90 degrees apart. One of them roller can detect the forward- backward motion of the mouse and other roller can detect the left–right motion of the Mouse. Opposite the two rollers is a third one (white, in the photo, at 45 degrees) that is spring-loaded to push the ball against the other two rollers. Every roller is on the same shaft as an encoder of the mouse wheel that has slotted edges; the slots interrupt infrared light (L.E.D) beams to generate electrical pulses that represent wheel movement. This is normal work of mouse
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