The Natural User Interface (NUI) is the next revolution of human-computer interaction. Microsoft Surface has shown the potential of multi-touch NUIs to uniquely engage users, and multi-touch tablets and displays are becoming more and more common. This session is focused on how you can create multi-touch NUIs for these devices. Learn the difference between manipulations and gestures, when to use each, and how to implement specific NUI design concepts with both Silverlight and the Windows Presentation Foundation (WPF) 4 Touch API. The differences between the Silverlight and WPF 4 Touch APIs are highlighted. If you are interested in rich, engaging multi-touch interfaces for the web or client, then you need to attend this session!