By C. A. R. Hoare
Communications of the ACM,
January 1983,
Vol. 26 No. 1, Pages 100-106
10.1145/357980.358021
Comments
This paper suggests that input and output are basic primitives of programming and that parallel composition of communicating sequential processes is a fundamental program structuring method. When combined with a development of Dijkstra's guarded command, these concepts are surprisingly versatile. Their use is illustrated by sample solutions of a variety of familiar programming exercises.
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