# expert system

> computer system that emulates the decision-making ability of a human expert

**Wikidata**: [Q184609](https://www.wikidata.org/wiki/Q184609)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Expert_system)  
**Source**: https://4ort.xyz/entity/expert-system

## Summary
An expert system is a computer system that emulates the decision-making ability of a human expert. It is classified as a type of artificial intelligence and as a knowledge-based system implemented as a computer program.

## Key Facts
- An expert system is a computer system that emulates the decision-making ability of a human expert.
- Expert system is a subclass of artificial intelligence.
- Expert system is a subclass of computer program.
- Expert system is a subclass of knowledge-based system.

## FAQs
### Q: What does an expert system do?
A: An expert system emulates the decision-making ability of a human expert. It does this as a computer system designed to produce expert-like decisions.

### Q: Is an expert system considered artificial intelligence?
A: Yes. Expert system is classified as a subclass of artificial intelligence.

### Q: Is an expert system a type of software?
A: Yes. Expert system is classified as a subclass of computer program.

### Q: How is an expert system related to knowledge-based systems?
A: Expert system is classified as a subclass of knowledge-based system. This places it within systems characterized by the use of knowledge to support decision-making.

## Why It Matters
Expert systems matter because they define a category of computer systems built to emulate the decision-making ability of a human expert. This framing connects expert systems directly to artificial intelligence as a subclass, establishing them as part of AI rather than general-purpose computing alone. Their classification as a computer program indicates they are implemented as software, which makes the concept applicable to practical computing deployments. Their classification as a knowledge-based system ties the concept to approaches that rely on explicit knowledge to support decisions, distinguishing them from systems that do not center on knowledge representation. Together, these properties make expert systems a useful reference point for organizing and comparing AI systems that aim to reproduce expert-level decision behavior in software form.

## Notable For
- Defined by the goal of emulating the decision-making ability of a human expert.
- Categorized simultaneously under artificial intelligence, computer program, and knowledge-based system.
- Identified as a computer system rather than a purely theoretical model.

## Body
### Definition
- An expert system is a computer system that emulates the decision-making ability of a human expert.

### Classification
- Expert system is a subclass of artificial intelligence.
- Expert system is a subclass of computer program.
- Expert system is a subclass of knowledge-based system.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "expert system",
  "description": "A computer system that emulates the decision-making ability of a human expert.",
  "additionalType": "artificial intelligence"
}

## References

1. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=7823)
2. Medical Subject Headings
3. Freebase Data Dumps. 2013
4. Nuovo soggettario
5. YSO-Wikidata mapping project
6. UMLS 2023
7. [Source](https://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/1297.02008?OpenDocument)
8. National Library of Israel
9. KBpedia
10. [expert-system · GitHub Topics](https://github.com/topics/expert-system)
11. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
12. Wikibase TDKIV