BRUIN /was/ distributed with CMS, but it’s far more similar to BASIC
than to PL/I.
https://usermanual.wiki/m/8f03e3390fa44cee401a987c285272e33c4c8c38355ea6e470fdbbf5d093ce9b.pdf
The idea that BRUIN is a PL/I-like language seems to be a
misinterpretation of the early statement that it was hoped that the
combination of BRUIN and PL/I would cover most university needs apart
from actual computer science.
FAPL (Format and Protocol Language) was a language based on PL/I that
was originally used for more precisely documenting SNA (IBM’s Systems
Network Architecure). However, when the DPPX operating system (for small
8100-series computers, later ported to small 370s) came out, a compiler
was built for FAPL to create the DPPX SNA stack.
Late in the 1960s, OS/360 and DOS/360 and their descendants changed from
Assembler to PL/I as a gross syntactic model for option strings and
command languages. Compare the PARM= strings of the F-Compiler to the
Optimizing Compiler, IEHPROGM to IDCAMS, or JCL to TSO commands, all
with a systematic change from optionname=value to optionname(value).
--
John W. Kennedy
Algernon Burbage, Lord Roderick, Father Martin, Bishop Baldwin,
King Pellinore, Captain Bailey, Merlin -- A Kingdom for a Stage!