Official Production System

Official Production System

(language)
(OPS) The first production system (i.e. rule based) programming language, developed at CMU in 1970 and used for building expert systems. OPS was originally written in Franz Lisp and later ported to other LISP dialects.
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It wasn't until 1981, after Carnegie-Mellon developed its "Official Production Systems" based on the Rete Algorithm that John McDermott published the seminal work in the commercial application of AI, "R1: A rule-based configurer of computer systems", which describes the first commercial expert system ever developed.