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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