Many of these features were adoptions from Windows Phone. In particular, these changes included a touch-optimized Windows shell based on Microsoft's 'Metro' design language and the Start screen (which displays programs and dynamically updated content on a grid of tiles), a new platform for developing ' apps' with an emphasis on touchscreen input, integration with online services (including the ability to synchronize apps and settings between devices), and Windows Store, an online distribution for downloading and purchasing new software, and a new keyboard shortcut for screenshots. Windows 8 introduced major changes to the operating system's platform and user interface intended to improve its user experience on tablets, where Windows was now competing with mobile operating systems, including Android and iOS. Windows 8 was made available for download via MSDN and TechNet and available as an upgrade to all Windows 7 users via Windows Update. The product was released to manufacturing on August 1, 2012, and generally to retail on October 26, 2012. Windows 8 is a major release of the Windows NT operating system developed by Microsoft.

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