Expert systems are part of a general category of computer applications known as artificial intelligence . To design an expert system, one needs a knowledge engineer, an individual who studies how human experts make decisions and translates the rules into terms that a computer can understand.

Expert systems tutorial
This tutorial provides sections on designing and expert system, rules and expert systems, an expert system shell in Prolog, and a quick case study.

JESS - the Java expert system shell
This is a download, informational and demo page for Jess - a clone of the core of the CLIPS expert system shell and written in Java.

Yahoo!'s expert systems page
Yahoo!'s directory of expert systems.

Expert system shells FAQ
This is a table of contents page for the FAQ on expert systems shells.