Windows 8-based member of the Windows Server server operating systems line
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7 identifiers linking Windows Server 2012 across the web's reference databases
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Windows Server 2012, codenamed "Windows Server 8", is the ninth major version of the Windows NT operating system produced by Microsoft to be released under the Windows Server brand name. It is the server version of Windows based on Windows 8 and succeeds the Windows 7-based Windows Server 2008 R2, released nearly three years earlier. Three pre-release versions, a developer preview, a beta version and a release candidate, were released during development. The software was officially launched on September 4, 2012, which was the month before the release of Windows 8. It was succeeded by Windows Server 2012 R2. Mainstream support ended on October 9, 2018, and extended support ended on October 10, 2023. It is eligible for the paid Extended Security Updates (ESU) program, which offers continued security updates until October 13, 2026.