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Language peer sets for PSNLST: Designed 1974 ↑ 1970s languages ↑ Fourth generation↑ High Cold War↑ PSNLST(ID:4625/psn001)alternate simple viewDesigned 1974 Production system language at CMU Rychener's PhD thesis Not a forerunner to OPS as widely stated, as it postdates it by many years. But a tibutory to OPS5 Places Related languages
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