The EDOC Conference is the primary annual event focusing on the confluence of the paradigms, technologies and methods involved in enterprise computing. EDOC 2005 is the next event in the successful series of conferences, which since 1997 has brought together leading researchers, architects and practitioners from both academia and industry to discuss enterprise computing challenges and solutions. Today the creation, operation and evolution of enterprise computing systems span concerns that range from high-level requirements and policy modelling through to the deployment of specific implementation technologies and paradigms, and involve a wide (and ever growing) range of methods, tools and technologies. They also cover a broad spectrum of vertical domains and industry segments, from electronic and mobile commerce through to real-time control systems. The EDOC Conference emphasises the integration of enterprise computing research and development results, fostering an enterprise engineering approach that can address and relate business, application and middleware levels. The themes of openness and distributed computing, comprising service-, component- and object-oriented approaches, provide a useful and unifying conceptual thread for this purpose.