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Sony pushed the envelope with the first full Windows XP computer with the 5-inch screen, making the first truly handheld computer. The resistive touchscreen was the first on any Windows computer, and the inclusion of a dock and portable keyboard could turn the handheld into a laptop replacement in just a few seconds. My coverage of the U-71 detailed installing the Windows XP Tablet Edition on it, producing the first handheld Tablet PC. This coverage caught the eye of none other than Bill Gates, who made the then conceptual UMPC a mandate to the Microsoft team to get it to market, according to those in a position to know.