Windows Server 2003

Windows Server 2003 is the server counterpart of Windows XP. It comes in flavors of Datacenter, Web Server, Standard, Enterprise and Small Business (the latter is technically a separate version). It replaces Windows Server] 2000] and was replaced by [[Windows Server 2008.

Codenames
Its internal codenames were either the dotNET (.NET) Server (As evidenced in the Windows Buildtree, where it's source is located at D:\dnsrv) and during the development of Windows Whistler (Windows XP), it was Code Named Whistler Server.

Release 2
An interim release was made, under the name Windows Server 2003 R2 on 2005-12-06.

Other versions
As well as the standard Windows Server 2003, several other editions were built on the NT5.2 kernel, including Storage Server 2003 R2 (released 2006-03-05), Compute Cluster Server 2003 (released 2006-06-09), Small Business Server 2003 R2 (released 2006-09-01) and Unified Data Storage Server 2003 (released 2006-12-05).

R2 RTM
This version is Windows Storage Server 2003 R2.

Compute Cluster Server

 * This is Beta Release for Compute Cluster Server.
 * This is Community Tech Preview, February 2006 for Compute Cluster Server.
 * This is the official RTM for Compute Cluster Server.