An argument can be made that Windows for Workgroups was Microsoft’s first server operating system. In that version, certain computers could be set to share resources and respond to requests from clients, which made them servers by definition. Microsoft’s first real server operating system was Windows NT. Its 3.5 and 3.51 versions ran on many business networks until Microsoft released its Windows Server line that continues to exist today. The most current Windows Server version is Windows Server 2016. This version supports numerous applications and databases as well as a hypervisor that allows virtual servers.
