Telephones and Mobiles
America, had made a
simple machine that changed sounds to electrical signals. The signals flashed
along a wire, almost a million times faster then sounds went through the air.
There are more then five billion phones in the world.
1970’s resistive touch-screens were
invented. Although capacitive touch-screens were designed first,
they were eclipsed in the early years of touch by
resistive touch-screens American inventor Doctor G. O. Samuel Hurst
developed resistive touch-screens.
By Lana
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