On Sat, 1 Sep 2018, John P. Linderman wrote:
> PL/I was a language designed by a committee, and it showed. [...]
I have never seen a full-blown PL/I compiler (only subsets), and I recall
being told that there never will be one because it is simply impossible,
given the spec.
Naturally I am happy to be proven wrong on this.
AM83 Multics PL1 Reference Manual, pg 1-1: "Multics PL/I is closely related to American National Standards Programming Language PL/I. ... ANSI X3.53-1976... For a complete description of the differences between Multics PL/I and Standard PL/I, see Appendix A of the PL/I Language Specification."
Appendix A, pp A-1 to A-4:
https://drive.google.com/open?id=1XJdaj8YGHTERjTu9xq3KEM0nAGiAFm2M