Agent Communication and Interaction.- Adding New Communication Services to the FIPA Message Transport System.- Analysis of Multi-Agent Interactions with Process Mining Techniques.- Engineering Agent Conversations with the DIALOG Framework.- Agents’ Bidding Strategies in a Combinatorial Auction.- Applications and Simulation.- Modeling and Simulation of Tests for Agents.- Agent-Based Simulation Versus Econometrics – from Macro- to Microscopic Approaches in Route Choice Simulation.- Agent Based Simulation Architecture for Evaluating Operational Policies in Transshipping Containers.- Agent Planning.- Diagnosis of Multi-agent Plan Execution.- Framework and Complexity Results for Coordinating Non-cooperative Planning Agents.- Agent-Oriented Software Engineering.- A Model Driven Approach to Agent-Based Service-Oriented Architectures.- Meta-models, Models, and Model Transformations: Towards Interoperable Agents.- Formation of Virtual Organizations Through Negotiation.- Continuations and Behavior Components Engineering in Multi-Agent Systems.- Trust and Security.- Evaluating Mobile Agent Platform Security.- A New Model for Trust and Reputation Management with an Ontology Based Approach for Similarity Between Tasks.