Windows 8 Version details

• Windows 8 is the basic edition of Windows for the x86 and x86-64 architectures.
• Windows 8 Pro succeeds Windows 7 Professional and Ultimate and is targeted towards enthusiasts and business users.
• Windows 8 Enterprise provides all the features in Windows 8 Pro (except the ability to install the Windows Media Center add-on), with additional features to assist with IT organization.
• Windows RT will only be available pre-installed on ARM-based devices such as tablet PCs, and was named for the Windows Runtime (WinRT) development platform that Microsoft is introducing in Windows 8.

Unlike Windows Vista and Windows 7, there are no Starter, Home Basic, Home Premium, or Ultimate editions