Simple Overview of Small Business Server 2003
Main Components of Small Business Server 2003
Small Business Server "Standard Edition"
Microsoft Server 2003
Microsoft SharePoint Services 2003
Microsoft Exchange 2003
Microsoft Outlook
Microsoft Shared Fax Services
Routing and Remote Access Services
Small Business Server "Premium Edition" (all of the above +)
SQL Server 2000
ISA Server 2004
Microsoft FrontPage 2003
For more information
https://www.microsoft.com/windowsserver2003/sbs/evaluation/features/default.mspx