One thing the slide rule did for me was to make me think and reduce equations to the lowest possible terms since the "rule" didn't place the decimal for your. Since most of my day involved calculations and their application, I got pretty good at it. I still have my K&E Deci-lon prominently displayed in my bookcase at home.
Texas Instruments came out with a "Reverse Polish Logic" calculator that worked on adding machine logic and just wasn't suited for scientific work as I needed it.
Hewlett Packard came out with a neat HP 35 and before you knew it a HP 45 full functional scientific calculator. Was $400 and the best money I ever spent. My productivity went up a thousand times......but nobody offered to reimburse me for it directly. However my "non periodic" pay raises more than compensated me.
Funny. Today you can get one 10 x more functionality for $29.99......but that's OK. Glad we are where we are in today's technology.....even though at my age, I let a lot of it pass me by.
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