Final answer:
An expert system is a computer program that uses artificial intelligence to mimic the knowledge and decision-making ability of a human expert in a specific domain.
Step-by-step explanation:
An expert system is a computer program that uses artificial intelligence to mimic the knowledge and decision-making ability of a human expert in a specific domain.
Expert systems are designed to solve complex problems by reasoning through a set of predefined rules and facts. They use a knowledge base, which contains information and rules about a specific subject matter, and an inference engine, which applies logic and reasoning to draw conclusions and make recommendations.
For example, in the field of medicine, an expert system can be developed to diagnose and suggest treatments for various diseases based on the symptoms presented by a patient and the knowledge of medical experts.