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Expert System

nounid 4880·updated Aug 28, 2026
verified

A computer system emulating the decision-making ability of a human expert through the use of reasoning, leveraging an encoding of domain-specific knowledge most commonly represented by sets of if-then rules rather than procedural code. The term “expert system” was used largely during the 1970s and ’80s amidst great enthusiasm about the power and promise of rule-based systems that relied on a “knowledge base” of domain-specific rules and rule-chaining procedures that map observations to conclusions or recommendations.

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Classifications

Entity Type

System100%manual revieweval-seeds-v0.3-2026-05-14

Sensitivity

unclassified

Information Class

unclassified

Variants

plural
Expert Systems
possessive
Expert System's
pluralpossessive
Expert Systems'

Framework definitions

AI Glossary: Artificial intelligence, in so many words1 senseview framework →
§1
A form of AI that attempts to replicate a human's expertise in an area, such as medical diagnosis. It combines a knowledge base with a set of hand-coded rules for applying that knowledge. Machine-learning techniques are increasingly replacing hand coding.
Systems and software engineering —Vocabulary1 senseview framework →
§1
Computer system that provides for expertly solving problems in a given field or application area by drawing inferences from a knowledge base developed from human expertise.
National Security Commission on Artificial Intelligence: The Final Report1 senseview framework →
§1
A computer system emulating the decision-making ability of a human expert through the use of reasoning, leveraging an encoding of domain-specific knowledge most commonly represented by sets of if-then rules rather than procedural code. The term “expert system” was used largely during the 1970s and ’80s amidst great enthusiasm about the power and promise of rule-based systems that relied on a “knowledge base” of domain-specific rules and rule-chaining procedures that map observations to conclusions or recommendations.
Glossary of Statistical Terms1 senseview framework →
§1
An expert system is an intelligent computer program that uses knowledge and inference procedures to solve problems that are difficult enough to require significant human expertise for their solution.
Introduction I.5 Glossary of Basic Terms1 senseview framework →
§1
Intelligent computer program that uses knowledge and inference procedures to solve problems that are difficult enough to require significant human expertise for their solution.
Legacy lexicon import1 senseview framework →
§1 · legacy_primary
A computer system emulating the decision-making ability of a human expert through the use of reasoning, leveraging an encoding of domain-specific knowledge most commonly represented by sets of if-then rules rather than procedural code. The term “expert system” was used largely during the 1970s and ’80s amidst great enthusiasm about the power and promise of rule-based systems that relied on a “knowledge base” of domain-specific rules and rule-chaining procedures that map observations to conclusions or recommendations.
DR-088 backfill from the noun definition column

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