OPS
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Ops
In ancient Roman religion, Ops or Opis, (Latin: "Plenty") was a fertility deity and earth-goddess of Sabine origin.
Mythology
In Ops' statues and coins, she is figured sitting down, as Chthonian deities normally are, and generally holds a scepter or a corn spike as her main attributes. The husband of Ops was Saturn. In Roman mythology, and in Greek mythology where Ops is identified as Rhea, her husband was Cronus, the bountiful monarch of the Golden Age. Cronus was Rhea's husband and brother. In Latin writings of the time, the singular nominative (Ops) is not used; only the form Opis is attested by classical authors. According to Festus (203:19), "Ops is said to be the wife of Saturn and the daughter of Caelus. By her they designated the earth, because the earth distributes all goods to the human genus" (Opis dicta est coniux Saturni per quam uolerunt terram significare, quia omnes opes humano generi terra tribuit). The Latin word ops means "riches, goods, abundance, gifts, munificence, plenty". The word is also related to opus, which means "work", particularly in the sense of "working the earth, ploughing, sowing". This activity was deemed sacred, and was often attended by religious rituals intended to obtain the good will of chthonic deities such as Ops and Consus. Ops is also related to the Sanskrit word ápnas ("goods, property").
OPS5
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.
OPS5 uses a forward chaining inference engine; programs execute by scanning "working memory elements" (which are vaguely object-like, with classes and attributes) looking for matches with the rules in "production memory". Rules have actions that may modify or remove the matched element, create new ones, perform side effects such as output, and so forth. Execution continues until no more matches can be found.
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