Product Description: Constitutes the refereed proceedings of the 12th International Conference on Coordination Models and Languages, COORDINATION 2010, held in Amsterdam, The Netherlands, in June 2010, as one of the federated conferences on Distributed Computing Techniques, DisCoTec 2010.

This collection of original research provides a comprehensive survey of developments at the leading edge of concurrent object-oriented programming. It documents progress―from general concepts to specific descriptions―in programming language design, semantic tools, systems, architectures, and applications. Chapters are written at a tutorial level and are accessible to a wide audience, including researchers, programmers, and technical managers.The problem of designing systems for concurrent programming has become an increasingly important area of research in computer science with a concomitant increase in the popularity of object-based programming. Because parallelism is a natural consequence of the use of objects, the development of systems for concurrent object-oriented programming is providing important software support for a new generation of concurrent computers.