I got an SR-56 programmable calculator for Christmas my junior year. I didn't use the programmable feature until we took a structures course where you had to invert matrices to solve problems. This was an arduous, time consuming task by hand, and one where mistakes were easy to make.I had a TI programmable scientific calculator in high school (75-77), it could be programed up to 50 steps. Senior year I learned BASIC as well as FORTRAN, punching 80-column Holarith cards which were run on the local University's IBM computer, which filled an entire room on campus, lol.
A friend of mine then opened the first COMPUTERLAND franchise in Salt Lake City around then, I helped him and his wife get the store up and running and remember all the old brands. Altair, Cromemco, Atari... and some startup called Apple, lol.
I still have my old Sans & Streiffe slide rule, the original pocket calculator lol.