One of the most well-known researchers in artificial intelligence and specifically within machine learning. He was one of the originators of the modern study of machine learning, in particular developing historically important tools such as ID3 and C4.5. He also contributed to inductive logic programming, with the development of his system called FOIL. He is Australian, and for a long time lectured at the University of Sydney.

He is currently running his company called RuleQuest, at:

His web page is at: