Using a standardized description format, including hypotheses transition diagrams which show the changing status of hypothesis as successive rules are applied, the authors analyse the architectures of 11 expert systems. This manual is intended for those who are interested in comparing the structure and dynamics of different kinds of expert systems without becoming bogged down in domain-specific detail or confused by differing terminologies. This book should be of interest to cognitive scientists; computer scientists, engineers; all those interested in expert systems design.