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Programming Language/Systems

<language> (PL/S) An IBM machine-oriented language derived from PL/I in the late 1960s for the IBM 360 and IBM 370. PL/S permitted inline assembly language and control over register usage.

Much of IBM 360 OS/MFT(?), OS/MVT(?), OS/VS1 and OS/VS2 (OS/SVS and MVS) were written in PL/S. It was used internally and never released to the public. It is documented in various IBM internal ZZ-? publications.

Versions: PLS1, PLSII.

["PL/S, Programming Language/Systems", W.R. Brittenham, Proc GUIDE Intl, GUIDE 34, May 14, 1972, pp. 540-556].

[Were MFT and MVT in PL/S or pure BAL? Dates?]

(1999-01-24)


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