The leading thinkers from the cognitive science tradition participated in a workshop sponsored by Sandia National Laboratories in July of 2003 to discuss progress in building their models‎.‎ The goal was to summarize the theoretical and empirical bases for cognitive systems and to present exemplary developments in the field‎.‎ Following the workshop‎,‎ a great deal of planning went into the creation of this book‎.‎ Eleven of the twenty‎-six presenters were asked to contribute chapters‎,‎ and four chapters are the product of the breakout sessions in which critical topics were discussed among the participants‎.‎ An introductory chapter provides the context for this compilation‎.‎ Cognitive Systems thus presents a unique merger of cognitive modeling and intelligent systems‎,‎ and attempts to overcome many of the problems inherent in current expert systems‎.‎ It will be of interest to researchers and students in the fields of cognitive science‎,‎ computational modeling‎,‎ intelligent systems‎,‎ artificial intelligence‎,‎ and human‎-computer interaction‎.‎