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An ultra-mobile personal computer (UMPC) is a Microsoft term that refers to a handheld device capable of running Microsoft’s Tablet PC operating system (OS). Original design specifications for UMPC were created by Microsoft and Intel. The UMPC's specifications were quietly launched in February 2006 and code named the Origami Project. The device is larger than a personal digital assistant (PDA) and smaller than a laptop and uses a touch screen or stylus.
The first UMPCs to hit the market were the Amtek T700 and the Samsung Q1, which were sold under a variety of names in the U.S. and Europe in 2006. Microsoft determined the following baseline specifications for a UMPC, although exact specifications will vary between manufacturers:
Overlapping handheld computing device design specifications resulted in UMPCs within a variety of categories, including subnotebook, ultraportable, mini-laptop, mobile Internet device or mini-notebook.