The Microsoft Professional Developers Conference (PDC) is a developer event focused on the technical strategy of the Microsoft developer platform. Since 1991, the PDC has been the epicenter of Microsoft's biggest platform annoucements including Microsoft .NET, Windows XP and Windows 7. This year, you will hear more details about our services platform, Windows, the Web, devices and our next generation of developer tools. Check out Channel 9 videos for new episodes of Countdown to PDC09 and Knowledge Chamber.