The .NET version of the Windows 2000 server operating system. Introduced in the spring of 2003, it was originally known as .NET Server 2003. Similar to the Windows 2000 offerings, Windows Server 2003 is available in several versions. The Enterprise and Datacenter Editions are geared for mission critical applications with support for clustering, failover and load balancing. They are also available in 64-bit versions for Intel's IA-64 architecture. The Web Edition is designed for hosting a website. See Windows Home Server, Windows Server 2016 and .NET Enterprise Server.Edition of SMPWindows Server 2003 Support RAM Standard 2-way 4GB Web Server 2-way 2GB 32-bit Enterprise 8-way 32GB 64-bit Enterprise 8-way 64GB 32-bit DataCenter 32-way 64GB 64-bit DataCenter 32-way 128GB.