Very cool! It warms my heart that a few of you will keep some of these vintage machines alive. I’m guessing there’s FORTRAN on there somewhere. Curious what you paid for it?
Mostly RPG rather than scientific computing, though you could get COBOL, FORTRAN and of course an assembler. 500 KIPS and very small RAM so likely those compilers were multiple passes and required a disc.
I did RPG II programming on the successor machine the S/36 for a few years. That was available in a micro form not bigger than a PC to mid and full size.
I still have nightmares of modifying old indicator infested RPG II spaghetti code for a local hospital to create magnetic tape versions of UB52 and form 1500’s.
I don't know if I would remember enough to be able to read an RPG program nor would I recognize RPG III and newer. We did use a third-party app that gave us RPG 2.5 where I worked last doing RPG. I still have 8" floppy disks with utilities I wrote at the time and the Pop editor.