It’s impossible to think about computing today without touchscreens. They’ve become the input device of choice on pretty much every mobile electronics gadget, and they’re just getting more and more popular. Companies had been researching infrared touchpanels since the 1940s, but the technology was finally presented to the public at the 1982 World’s Fair in Knoxville, Tennessee. 33 TV sets covered with Elographics transparent panels showed off a variety of functions. The next year, Hewlett-Packard made the first touchscreen computer available to the public. Also making its debut at the ’82 fair was Cherry Coke.
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