> On Nov 23, 2021, at 12:31, Adam Thornton wrote: > >  > >> On Tue, Nov 23, 2021 at 1:00 AM Henry Bent wrote: >> What language were the PL/I compilers written in? >> >> Wikipedia claims that IBM is still developing a PL/I compiler, which I suppose I have no reason to disbelieve, but I'm very curious as to who is using it and for what purpose. >> >> >> >> I have a vague recollection that PL/X was a PL/I variant used for internal development on VM/CMS. Does that ring any bells for anyone? >> >> Adam