expert system

noun Computers.
a program that gives answers, solutions, or diagnoses, based on available information, by following procedures that attempt to duplicate the thought processes and apply the knowledge of an expert in some particular field.

Origin:
1975–80

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World English Dictionary
expert system
 
n
a computer program that can offer intelligent advice or make intelligent decisions using rule-based programs

Collins English Dictionary - Complete & Unabridged 10th Edition
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Computing Dictionary

expert system definition

artificial intelligence
A computer program that contains a knowledge base and a set of algorithms or rules that infer new facts from knowledge and from incoming data.
An expert system is an artificial intelligence application that uses a knowledge base of human expertise to aid in solving problems. The degree of problem solving is based on the quality of the data and rules obtained from the human expert. Expert systems are designed to perform at a human expert level. In practice, they will perform both well below and well above that of an individual expert.
The expert system derives its answers by running the knowledge base through an inference engine, a software program that interacts with the user and processes the results from the rules and data in the knowledge base.
Expert systems are used in applications such as medical diagnosis, equipment repair, investment analysis, financial, estate and insurance planning, route scheduling for delivery vehicles, contract bidding, counseling for self-service customers, production control and training.
[Difference from "knowledge-based system"?]
(1996-05-29)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Use of expert system software has the potential to speed diagnosis, reduce medical errors, and reduce the cost of medical care.
All it is, is an expert system tagged onto a search engine.
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