Friday, March 31, 2017

TELL ME WHY?




What is touchpad?


A touchpad is a device for pointing on a computer display

screen. It is an alternative to the mouse.
  
It was invented by George E. Gerpheide in 1988. The touchpad

is a flat area, located beneath your keyboard. When you move

your finger across the touchpad surface a corresponding mouse

pointer moves around your computer screen. With a touchpad

you perform clicking actions to open or select things on screen

by using the right and left buttons on the bottom of the

touchpad. Under the soft skin of the touchpad, there is an

array of sensors which create an electrical field. The finger

changes the character of the electric field allowing the user to

drag a cursor across the screen.
  
(From Manorama TELL ME WHY No. 117)


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