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Surface RT, 2012
The snappily titled Surface with Windows 8 RT (mostly known as the Surface RT) is Microsoft's most recent attempt to build its own tablet hardware. Running the slimmed down Windows 8 RT operating system, it's aimed at consumers, coming in at the same price as the iPad.
Because it runs on ARM chips, the Windows 8 RT operating system can't run normal desktop apps — only ones downloaded from the Microsoft Store. Reviews have varied, though it has won some admirers.