Batelle Pacific Northwest National Laboratory - links to on-line demos such as Whale Watcher and Occupational Safety and Health Admininstration applications. JAVA and CGI scripts. Also Exsys Corp runtime applications.
PC AI Magazine - general information on the E.S. technologies such as case based reasoning. Also contains Expert Systems shell vendor links.
John Saunders links - this page contain some interesting links missing from the previous two - such as military applications..