An expert system is an application of artificial intelligence. In artificial intelligence, expert systems are the computer programs that rely on obtaining the knowledge of human experts and programming that knowledge into a system.

Expert systems emulate the decision-making ability of human experts. These systems are designed to solve the complex problem through bodies of knowledge rather than conventional procedural code.

One of the examples of an expert system is a Suggestion for the spelling error while typing in the Google search box.

Following are some characteristics of expert systems:

High performance

Reliable

Highly responsive

Understandable