ABSTRACT
The disk that accompanies this book contains the ACT-R system and the produc tion systems reported throughout the book. Part of the motivation behind mak ing this disk available is to communicate the theory with a precision that would not be possible even if program listings were included in the book. These sys tems can be run and inspected at any level of detail desired. In doing so, you may well find interesting issues hidden in the code, which may not surface in the book.
