Windows RT
on August 26, 2012, with the release of three Windows RT-based devices, including Microsoft's original Surface tablet. Unlike Windows 8, Windows RT is only available as preloaded software on devices specifically designed for the operating system by original equipment manufacturers (OEMs). Normal apps such as Google Chrome can't be downloaded on Windows RT through any web browser, the only way to get apps on Windows RT is by using the Windows Store, which is an app store for Microsoft Windows, starting from Windows 8 and Windows 8.1 and is also compatible with some version of Windows Server operating systems, such as Windows Server 2012 and Windows Server 2012 R2.