The OS has come in for criticism but praise goes too, for having access to the Microsoft productivity suite, and the extensibility of Windows 8 across mobile and the desktop, though the launch model has a pared down version of the OS, RT, which limits productivity.

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Windows RT is a specifically designed version of Windows 8 OS for ARM devices such as tablets.

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And the Windows run time (what the RT stands for) sounds closer to Windows 8 than iOS is to Mac OS X.

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