CLIPS

CLIPS is a public-domain software tool for building expert systems. The syntax and name were inspired by Charles Forgy's OPS5. The first versions of CLIPS were developed starting in 1985 at the NASA Johnson Space Center until 1996, when the development group's responsibilities ceased to focus on expert system technology. The original name of the project was NASA's AI Language (NAIL). Wikipedia

Created Year: 1985
Developed by: Lyndon B. Johnson Space Center
Implemented in: C
Named after: OPS5

Wikidata: Q165372

Influenced by: LispOPS5

Programming paradigms: object-oriented programming

Language types: object-based languagerule-based language

CLIPS Influence Network

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Hello World in CLIPS

(defrule hw
    (f ?x)
=>
    (printout t ?x crlf))

(assert (f "Hello World"))

(run)

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Latest data update: 2026-02-28