I saw this in the Programming Language News blog...
PL/I for GCC 0.0.14 has been released. It is a PL/I front-end for the GNU Compiler Collection.I wonder who's using it for what. Which computers ran PL/I in the past? IBM had an implementation for mainframes. Maybe for other mid-range systems as well?
PL/I was the systems programming language for Data General's mini and supermini computers. That's where I used it. I understand this was not quite *all* of IBM's PL/I specification. The language is fairly large.
It is somewhat more attractive than COBOL from my limited experience with both languages. It was straightforwardly procedural and recursive, with a reasonable exception handling mechanism. I'm not sure why PL/I did not win out over COBOL, unless it was the shear momentum of COBOL before PL/I was ready.
Doug Landauer adds some interesting history in the comments. I forgot about Gary Kildall and PL/M.