Windows Server 2003, Web Edition :- is mainly for building and hosting Web applications, Web pages, and XML Web Services.

Windows Server 2003, Standard Edition :- is aimed towards small to medium sized businesses. Flexible yet versatile, Standard Edition supports file and printer sharing, offers secure Internet connectivity, and allows centralized desktop application deployment

Windows Server 2003, Enterprise Edition :- is aimed towards medium to large businesses. It is a full-function server operating system that supports up to eight processors and provides enterprise-class features such as eight-node clustering using MICROSOFT Cluster Server (MSCS) SOFTWARE and support for up to 32 GB of memory.

Windows Server 2003, Datacenter Edition:- is the flagship of the Windows Server line and designed for immense infrastructures demanding high security and reliability.

Windows Server 2003, Compute Cluster Edition:- is designed for working with the most difficult computing problems that would require high performance computing clusters.

Windows Storage Server 2003:- is optimised to provide dedicated file and print sharing services. It is only available through OEMs when purchased pre-configured with network ATTACHED storage devices.

Windows Server 2003, Web Edition :- is mainly for building and hosting Web applications, Web pages, and XML Web Services.

Windows Server 2003, Standard Edition :- is aimed towards small to medium sized businesses. Flexible yet versatile, Standard Edition supports file and printer sharing, offers secure Internet connectivity, and allows centralized desktop application deployment

Windows Server 2003, Enterprise Edition :- is aimed towards medium to large businesses. It is a full-function server operating system that supports up to eight processors and provides enterprise-class features such as eight-node clustering using Microsoft Cluster Server (MSCS) software and support for up to 32 GB of memory.

Windows Server 2003, Datacenter Edition:- is the flagship of the Windows Server line and designed for immense infrastructures demanding high security and reliability.

Windows Server 2003, Compute Cluster Edition:- is designed for working with the most difficult computing problems that would require high performance computing clusters.

Windows Storage Server 2003:- is optimised to provide dedicated file and print sharing services. It is only available through OEMs when purchased pre-configured with network attached storage devices.