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An expert system is a computer program that is designed to emulate and mimic human intelligence, skills or behavior.
It is mainly developed using artificial intelligence concepts, tools and technologies, and possesses expert knowledge in a particular field, topic or skill.
An expert system is typically designed to provide capabilities similar to those of a human expert when performing a task. Moreover, it can be used to drive vehicles, provide financial forecasts or do things that human experts do.
An expert system usually has two core components: