There are the Windows SharePoint Services (WSS), the Microsoft Office SharePoint Server (MOSS) and Microsoft Search Server. Each bring their own functionalities to the table and build upon each other.
Windows SharePoint Services function the basic functionality that Gartner calls Basic Content Services. It offers the user access to Versioning and Check-in/Checkout functionality. WSS can then be extended through the use of the applets to add additional collaborative functions like email alerts, shared calendars, etc.
