Windows 8 is a version of Microsoft Windows (an operating system developed by Microsoft) for use on personal computers, including home and business desktops, laptops, tablets, and home theater PCs. Development of Windows 8 started before the release of its predecessor, Windows 7, in 2009.
It was announced at CES 2011, and followed by the release of three pre-release versions from September 2011 to May 2012. The operating system was released to manufacturing on August 1, 2012, and was released for general availability on October 26, 2012. Windows 8 uses version 6.2 of the Windows NT kernel.
Windows 8 introduces significant changes to the operating system’s platform, primarily focused towards improving its user experience on mobile devices such as tablets to better compete with other mobile operating systems like Android and Apple’s iOS.
Windows 8 features a new touch user interface and shell based on Microsoft’s “Metro” design language, featuring a new Start screen with a grid of dynamically updating tiles that represent applications.
The Start screen replaces the “Start menu” of earlier Windows versions. There is a new app platform with an emphasis on touchscreen input, and the new Windows Store to obtain and/or purchase applications to run on the operating system.