If you own an iPad, you might have trouble remembering just how terrible tablets were a few years ago. The first one was released to great fanfare. In 1992, Apple's chief executive, John Sculley, told a crowded room in Las Vegas that a new generation of portable handheld devices was about to change the world of personal computing. Their advanced handwriting recognition capabilities, he proclaimed, would make keyboards obsolete. The following year, Apple released the first such device. Called the Messagepad, it ran an operating system called Newton, and the brilliant new input device that would replace the keyboard was a pen.
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