Tom Resing presents on integrating external data into SharePoint using Business Connectivity Services (BCS). BCS allows connecting to external systems and presenting the data in SharePoint as lists and columns. The presentation demonstrates creating an external content type to represent data from an external system and then consuming that content type to display external data in SharePoint lists and libraries. It also summarizes new features for BCS in SharePoint 2013, including performance improvements for external lists and the ability to export external list data to Excel.