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Language peer sets for OPAL: Designed 1975 ↑ 1970s languages ↑ Fourth generation↑ High Cold War↑ OPAL(ID:8289/)alternate simple viewDesigned 1975 Matrix and celestial emchanics system based on the Prorab interpreter References: Search in: Google Google scholar World Cat Yahoo Overture DBLP Monash bib NZ IEEE  ACM portal CiteSeer CSB ncstrl jstor Bookfinder |