Today, the mouse is an essential input device for all modern computers but it wasn't so long ago that computers had no mouse and no graphical user interface. It was all done by typing commands on a keyboard.
The computer mouse was the creation of Mr. Doug Engelbart in 1968. His team at the Stanford Research Institute in California, who needed a simple way of controlling their computers. The result was a carved wooden block mounted on wheels, with a long cable trailing out the back. One researcher nicknamed it a mouse , and the moniker stuck.
The ball replaced the wheels and was capable of monitoring movement in any diction. The ball came into contact with two rollers that in turn spun wheels with graduations on them that could be turned into electrical pulses representing direction and speed.
At the time Bill English was working for Xerox Parc (Palo Alto Research Centre) the research and development centre set-up by Xerox to 'design the future of computing'. The mouse became part of the ground breaking Xerox Alto computer system which was the first minicomputer system to offer a graphical user interface.
It would be another 8 years before the mouse would be developed any further. An optical mouse was developed in around 1980 and eliminating the ball which often became dirty from rolling round the desktop negatively affecting its operation. However, they were far too expensive to be used widely. In fact it wasn't until around 1998 with the increase in microcontroller processing power and the reduction in component costs that optical mice became a commercially viable alternative to the ball mouse and infiltrate the mass consumer market.
Today in 2006 the optical mouse has completely replaced the ball mouse being supplied as standard with all new computers.
PC mouse jack has two types, those are USB jacks & PS/2 jacks.
Now a days computer mouse has two types, those are Optical mouse and Lacer mouse.
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