>> On Sat, 20 Jun 2026, ben via cctalk wrote:
>>> PL/1 and C are the only two high level languages a operating system is
>>> written in, that I can think of that are well documented, and easily found
>>> on the WEB.
That clearly is not even close to true. There is ALGOL (or rather its dialect
ESPOL) used by Burroughs. There's CYBIL, used by CDC. There's BLISS, used by
DEC. And if you include embedded RTOS, there's FORTH.
Just a couple I can think of in 30 seconds.
Did anyone use FORTRAN? I do remember IBM wrote the OS/360 FORTRAN (H)
compiler in FORTRAN.
paul
