Windows Server 2016 (formerly Windows Server vNext) is an upcoming server operating system

1280px-Desktop on Windows Server 2016

Windows Server 2016

developed by Microsoft as part of the Windows NT family of operating systems, developed concurrently with Windows 10. The first early preview version (Technical Preview) became available on 1 October 2014 together with the first technical preview of System Center,[2] and is currently in public beta testing. The final release date for the server is expected to be in early 2016, that is, not released simultaneously with the client operating system Windows 10 as was the case with the last three operating system releases.