Continuing his exploration of the organization of complexity & the science of design this new edition of Herbert Simon's classic work on artificial intelligence adds a chapter that sorts out the current themes & tools -- chaos adaptive systems genetic algorithms -- for analyzing complexity & complex systems There are updates throughout the book as well These take into account important advances in cognitive psychology & the science of design while confirming & extending the book's basic thesis that a physical symbol system has the necessary & sufficient means for intelligent action The chapter " Economic Reality" has also been revised to reflect a change in emphasis in Simon's thinking about the respective roles of organizations & markets in economic systems