I never had or used a slide rule. Calculators were not allowed thru high school/trade school (64)
Basically, pencil and paper, and quite a lot in my head. That set off a few teachers, as I had the answers, but could not show the work. They showed me how to show the work!!
Today, I use the adding machine on my desk occasionally, but most of the time I do it manually. I like numbers!!
