Microsoft SharePoint Products and Technologies includes SharePoint Portal Server for portal sites and Windows SharePoint Services for team sites.
SharePoint Portal Server 2003 is a secure, scalable, enterprise portal server built upon Windows SharePoint Services that you can use to aggregate SharePoint sites, information, and applications into a single portal site. All features of Windows SharePoint Services are available in SharePoint Portal Server 2003.
Windows SharePoint Services is a collection of services for Windows Server 2003 that you can use to share information, collaborate with other users on documents, and create lists and Web Part Pages.
Visit the Office Developer Center for code samples, community sites, technical articles and documentation, webcasts, upcoming developer events, and more.
Windows SharePoint Services
Visit the product site to learn more about Windows SharePoint Services.