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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.
Simply popping the Sony U-70 in the dock added a full set of connections, including the ability to connect an external monitor and keyboard and mouse. This created a full Windows computing system that also had a responsive touchscreen for control. The original models had to be imported from Japan at an insane price, but Sony released the U-750 in the U. S. The high cost never generated significant sales for Sony, and the line was eventually dropped.
Toshiba produced the first handheld device with a VGA screen, setting the stage for the PDAs and smartphones down the road. The e805 was light yet the most powerful mobile device of the time. It cemented the dominance of Windows Mobile in the handheld segment.