Here’s the list of Windows Servers from Microsoft: Advertisements Microsoft releases a server version of Windows OS, along with each client version. Before that, Windows 2000 was the client version, and Windows NT 4.0 was the server version of the Operating System. Microsoft first used the word “Windows Server” when they released Windows Server 2000. The first popular version of Windows Server was called Windows NT, which came in both server and client versions. Windows Server has existed for almost as long as the consumer Windows versions (Windows 3.1 and onward). For example, Windows Server comes with an Active Directory feature that centralizes the user management of a business. Servers are powerful machines that serve different services to a specific network or the Internet. Windows Server is Microsoft’s flagship product for servers.
