Through the seven books that comprise the IT Infrastructure Library (ITIL), you can learn to set up your organization based on services and use a service-based approach to run the IT infrastructure. Service-Oriented Architecture (SOA) is a key initiative for most IT organizations. In this article, explore the principles of ITIL and SOA — and the ideas that tie these initiatives together.

http://www-128.ibm.com/developerworks/ibm/library/ar-soaitil/