Mice

=Strand 3: IT Systems=

MIce
Mice

A mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons The name mouse//,// the idea first came to at Stanford Research Institute, it comes from the resemblance of early models to the common mouse.

The world's first trackball invented by Tom Cranston, Fred Longstaff and Kenyon Taylor in 1952. It used a standard Canadian five-pin bowling ball. It was not original, as it was a secret military project.

Bill English, builder of Engelbart's original mouse, invented the ball mouse in 1972. The ball-mouse replaced the external wheels with a single ball that could rotate in any direction. Perpendicular gears logged inside the mouses body cuts beams of light on the way to light sensors, which detects the turns of the motion of the ball

=
An optical mouse uses a light-emitting diode and photodiodes to detect movement relative to the underlying surface, rather than moving some of its parts =====

**[[image:imagesCACMPSF4.jpg width="84" height="75"]] Glass laser mice**
Glass laser or glaser mice have the same capability of a laser mouse but can also be used on top of mirror or transparent glass.

Computers of the future could be controlled by eye movements, rather than a mouse or keyboard.
 * The Future**

"Eye-trackers will one day be so reliable and so simple that they will become yet another input device on your computer, like a much more sophisticated mouse," said Professor Guang-Zhong Yang of the Department of Computing at Imperial College. []