Agents are software processes that perceive and act in an environment processing their
perceptions to make intelligent decisions about actions to achieve their goals. Multi-agent
systems have multiple agents that work in the same environment to achieve either joint or
conflicting goals. Agent computing and technology is an exciting emerging paradigm expected to
play a key role in many society-changing practices from disaster response to manufacturing to
agriculture. Agent and mul- agent researchers are focused on building working systems that
bring together a broad range of technical areas from market theory to software engineering to
user interfaces. Agent systems are expected to operate in real-world environments with all the
challenges complex environments present. After 11 successful PRIMA workshops conferences
(Pacific-Rim International Conference Workshop on Multi-Agents) PRIMA became a new conference
titled International Conference on Principles of Practice in Multi-Agent Systems in 2009. With
over 100 submissions an acceptance rate for full papers of 25% and 50% for posters a
demonstration session an industry track a RoboCup competition and workshops and tutorials
PRIMA has become an important venue for multi-agent research. Papers submitted are from all
parts of the world though with a higher representation of Pacific Rim countries than other
major multi-agent research forums. This volume presents 34 high-quality and exciting technical
papers on multimedia research and an additional 18 poster papers that give brief views on
exciting research.
