Official Production System version 5, aka Official Production System version 5, is a historical programming language created in 1977. OPS5 is a rule-based or production system computer language, notable as the first such language to be used in a successful expert system, the R1/XCON system used to configure VAX computers. The OPS (said to be short for "Official Production System") family was developed in the late 1970s by Charles Forgy while at Carnegie Mellon University. Allen Newell's research group in artificial intelligence had been working on production systems for some time, but Forgy's implementation, based on his Rete algorithm, was especially efficient, sufficiently so that it was possible to scale up to larger problems involving hundreds or thousands of rules. Read more on Wikipedia...

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Example code from the web:

(compute 2 + (3 * 4) + 5)

Last updated October 14th, 2019