No. SOA is not a product, but an architecture approach and set of patterns for implementing agile, loosely coupled dynamic applications. A reflection of its commitment to developing the standards, guidance, tools and technologies needed for developing cross-platform integration solutions, Microsoft has been using service orientation across its products since 1999, when the Web services model was announced and a wave of innovation began that fundamentally changed the application architecture landscape. Beginning with version 1.0 of the .NET Framework, the Microsoft investments in tools, together with platform support for Web services, have helped make Service Orientation mainstream and practical. Working with other vendors such as IBM and BEA, we invested in authoring a set of specifications referred to collectively as the WS-* architecture. Shortly thereafter, in order to promote interoperability across platforms, operating systems and programming languages, Microsoft worked with IBM to develop the Web Services Interoperability Organization (WS-I). Since it was created, WS-I has grown to roughly 150 member companies and has created Web services that address areas such as interoperability, security and the reliability of messaging.