In the existing literature the intersection of agent techno- logy with soft computing is a very recent and attractive is- sue. The book is devoted to a unifying perspective of this topic. In contains contributions by well-known authors who- se expertise is universally recognized in these crossing areas. Particular emphasis is devoted to advanced research projects involved with Web-related technologies Fundamental topics explored in this volume are: - formal theories and logics t represent and handle imprecise communication acts among communities of agents;- soft-computing approaches to define distributed problem-solving techniques to represent and reason about large-scale control systems; - decomposition of a coplex system into autonomous or semiautonomous agents through evolutionary model.