Computer system (usually an application) designed to simulate the problem-solving behavior of a human who is an expert in a particular domain or discipline.

• Artificial Intelligence and Expert Systems - syllabus to a course taught by Ruth A. Palmquist at the University of Texas in 1996
• Navigator Interface - designed by David Stern at Yale University to help users determine - and in many cases transparently link to - the most appropriate source for their information need(s) in the sciences