The ATOP (Agent-Based Technologies and Applications for Enterprise Interoperability) workshop
series focuses on technologies that support interoperability in networked organizations on
successful applications of these technologies and on lessons learned. So far two ATOP
workshops have been held at the AAMAS conferences in Utrecht The Netherlands in July 2005
and in Estoril Portugal in May 2008. The 13 papers presented here are extended versions of
carefully reviewed and selected contributions to the workshops. The topics covered are business
interoperability organizations and virtual institutions modeling multiagent systems agent
interaction and security. The main goal was to collect approaches for the application of agent
technologies in these areas. Current trends in the development of agent technologies are
compared with recent developments in service-oriented and model-driven system design with
respect to their ability to solve interoperability problems.
