That was probably Fortran (Formula Translator). Doing programs on punch cards led to the notion of subroutines — a slightly worn set of cards in a rubber band with the top one labeled in felt tip, “Pi” or “Square root”, was part of pro programmers’ tool kits. :^)
You’re right. Fortran. I was listed as a ‘research assistant’ on a project that used punch cards... so long ago. Thanks.