re: #598 Marvo76

I actually could use a slide rule at one time, I took Electronics in the mid 70’s and our teacher was an old school guy who thought using a caluculator made you lazy (that and a Texas instruments cost over $50 at the time)

Got a slide rule for college; used it freshman year. At the time, a “scientific” calculator, the SR-10 (scientific in that it had square root and scientific notation), was over $100.
For the next year, I had an SR-50, with all the functions we take for granted in a $15 scientific calculator today, only for $150. Of course, it had rechargeable batteries, because LEDs used so much power.
Senior year, I got an HP-67, which had a magnetic card to store programs and data.
Still have the slide rule and calculators.