Here’s a link to the Eliza demo we reviewed in class. http://chayden.net/eliza/Eliza.html
You must have a Java enabled browser to run the demo.
Eliza was developed a long time ago and is primitive by today’s standards. But it can give you some insights related to Expert Systems. Look for the accumulation of knowledge as you interact with Eliza and the use of the knowledge later in the conversation.