This presentation provides an overview of Business Connectivity Services (BCS) in SharePoint 2010. BCS allows SharePoint to connect to external data sources and systems. The presentation discusses BCS solutions, creating BDC models to define external content types, performing CRUD operations on external data, and searching external data through BCS. It also covers authentication in BCS and tooling support in Visual Studio 2010 and SharePoint Designer 2010. The presentation concludes with a demonstration of searching external data using BCS.