I learned FORTRAN 66 (or FORTRAN 4 - can't quite remember) in 1975 when I was 36 years old. The class was offered by the School of Business and run on a CDC 6500 60 bit computer. Input was punch cards ander the cycle was: punch the cards for code being really careful to keep them in order; sandwich the cards between the CDC control language cards, wrap with rubber bands and drop in an input window; after 45 minutes to a couple of hours time later start checking for output consisting of the printer output wrapped around the cards; correct errors; and repeat the cycle.
I learned quite quickly that the lab was almost empty at 10 PM so I got in the habit of doing my homework at night. I made friends with the operator and learned how to operate the machine which had 5 MB disk drives that were larger than my washing machine. IIRC it had 64 MB of memory and that 32 MB were available to the user. The printers were really, really fast and someone had wired a speaker to some part of the CPU so one could differentiate sounds and sometimes discern what tasks it was doing.
Later that semester a time sharing system was set up and I switched to using a teletype for input and then used it for class but the FORTRAN was a little different, I taught myself BASIC at that time as well.
One other thing I remembered was that most of the students, I think they were actually in the School of Business, had a really hard time 'getting it'. I used to compose my homework while the instructor was answering their questions.
It was 'spaghetti' programming at its worst.