Tablet PCs are essentially 3- to 4-pound "ultra-portable" notebook PCs with touch screens, wireless Internet connections, and speech and handwriting input. Some, known as convertibles, have screens that can rotate 180 degrees and fold down to create a tablet. Others follow a more traditional, tablet-only route.
HP's Compaq Tablet PC TC1000 does both. The machine can be used like a notebook or like a tablet, thanks to a special detachable keyboard, and can also serve as a primary PC through a docking station.
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