PI Web Services 2010 brings PI System data access to service-oriented architectures by embracing web service standards, internet security models, and the Windows Communication Foundation (WCF). Developers and integrators can use PI Web Services for business integration, web-based visualization, and read-write access from virtually all platforms and programming languages. The programming interface is straightforward and easily accessible to SOAP programmers. This session will demonstrate how to build clients using a variety of tools and platforms for secure access to PI System data. Security models for intranets, extranets, and the Internet will be explained and demonstrated.