Computer mouse is very essential thing when you using computers, now days in laptops, there are touch pads but when using mouse it is very easy.
In 1963, the first mouse invented by Douglas Engelbart at the Stanford Research institute. This inventor Douglas Engelbart also invented the hypertext. In this first mouse used two wheels positioned at a 90 degree to each other to keep track of the movement. That’s how it works.
Another some popular mouse is ball mouse it invented in 1972. An optical mouse invented in 1980 but it didn’t popular at that time, but presently it is very popular among home PCs.
This picture shows the wheels that make contact with working surface.
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