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| | Languages Related to PL/I |
 | | PL/S is an IBM systems programming language for S/360, S/370, and z/Server systems. |
 | | An early (late 60's) version of PL/S was also known as BSL (Basic Systems Language). |
 | | Wiederhold, Gio, and Ehrman, John; "Inferred SYNTAX and SEMANTICS of PL/S"; Proceedings of the SIGPLAN symposium on Languages for system implementation New York, ACM, Inc., October, 1971; p.111-121. |
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