Windows Server 2003 Product Variants:

•  Microsoft Windows Small Business Edition 2003: This is a terrific product designed for businesses with up to 75 computers. Based on Server 2003, Standard Edition, Small Business Server has productivity tools that most would feel would be available for large businesses.
•  Microsoft Windows Server 2003, Standard Edition: This is the operating system software for most businesses in the "small to medium" size range that are too big for Small Business Server. It is designed for situations that do not require increased hardware support and clustering.
•  Microsoft Windows Server 2003, Enterprise Edition: This edition of Server 2003 has capabilities that are designed for a large business, particularly those with multiple locations. It includes features that enhance scalability, dependability, and availability. Enterprise Edition supports high performance servers. Servers running Enterprise edition can be clustered to handle large loads.
•  Microsoft Windows Server 2003, Web Edition: This subset of Windows Server 2003 is designed to be a web server. To increase protection of the business network, some Server 2003 components such as Active Directory have been removed.