When I, too, started it was FORTRAN. Indeed, on the machine upon which I learned to program, it could be nothing else: 6 bit characters (packed 8 characters per 48 bit word, it didn't yet have a character data type). I think they had, in addition to FORTRAN and assembler, COBOL, ALGOL (I'm not sure which flavor; this was in the early 70's), LISP, SNOBOL, ICEBALL (a dialect of SNOBOL), and IITRAN, (there was, iirc, one other installation of IITRAN).