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INCITS 53-1976[S2008]
Programming Language PL/l (formerly ANSI X3.53-1976 (R1998))
Specifies both the form and interpretation of computer programs written in PL/I. Is intended to provide a high degree of machine independence and thereby facilitate program exchange among a variety of computing systems. The standard serves as an authoritative reference rather than as a tutorial exposition.
InterNational Committee for Information Technology Standards [incits]