Comment EDSAC Autocode (Score 1) 633
EDSAC 2 had vacuum tubes for logic and mercury delay lines for memory. The programming course was taught by Maurice Wilkes in an auditorium to several hundred undergraduates, using a very bad PA system. I persuaded my Physics practical supervisor to let me use EDSAC to perform simple calculations on my experiment results and I wrote my first program in 1963 or 1964. [I was studying Maths and Physics because there were no Computer Science degrees back then.]
After that, during my PhD, I learned machine code for the Digital PDP-8, a lovely little machine, and used it to drive my experiment hardware and collect results. I also learned PDP-8 Fortran, which was so stripped down it did not even have subroutines, and Algol 60 to use the Maths department's IBM 1620.
Over my career I have had to be promiscuous about programming languages: POP-2, LISP, PROLOG , POP-11, Pascal, Java, C, C++, Basic(!), Javascript...