These presentations describe the architectural vision that drives the "Longhorn wave" of technologies from Microsoft, and introduce a set of key initiatives that will form the pillars of the Longhorn solution architecture. Perspectives range from the metaphorical to the pragmatic. At one end, Pat Helland relates the evolution of technology architectures to the evolution of city planning (and showing us how far we have yet to go!). At the other, John Dawson presents the proven data center patterns developed by the Microsoft Systems Architecture team. Explore these presentations to discover how Microsoft views the road ahead, and what tools and technologies Microsoft plans to deliver to help you blaze your own trail to a more felicitous, better integrated enterprise application portfolio.