[This documentation is preliminary and is subject to change.]
Microsoft SharePoint Server 2010 includes new features and enhancements to current functionality, and the SharePoint Server 2010 SDK provides guidance on how to take advantage of programmability enhancements and use and extend new features programmatically.
The following topics summarize key additions and improvements in each feature area of SharePoint Server 2010 and point to topics in the SDK that discuss them in more detail.
SharePoint Server 2010 General Reference