The expert system is computer software that can handle complicated issues and make decisions the same way a human expert can. It does so by pulling information from its knowledge base based on the user's queries, employing logical and inference procedures. The expert system is an AI component that handles the most difficult problems as an expert by pulling information from its knowledge base. Like a human expert, the system assists in decision-making for complex problems by employing both facts and heuristics. It is so named because it comprises expert knowledge of a certain subject and is capable of solving any complicated problem in that domain. These systems are tailored to a particular field, such as medicine or science.