Microsoft revealed its full Windows 8 suite this evening, which includes Windows 8, Windows 8 Pro, and Windows 8 Enterprise. However, most notably, there is another version named “Windows RT” that will run on ARM-based machines. This version is primarily aimed at tablets, according to Nilay Patel at The Verge:
Specifically, Windows RT will not be sold separately, but only available pre-installed on new machines with ARM processors. That’s a major change in the way Microsoft has traditionally sold Windows, and it underscores a more integrated approach to ARM-powered devices like tablets. Windows RT will also include the Office suite as we previously reported, but no other desktop apps can be installed on ARM machines. Windows RT will also lack the traditional Windows Media Player and most of the enterprise features found in Windows 8 Pro and Enterprise.