And there are people who simply can’t stand it. Of course the hand calculator has gone the way of the dodo bird by now but I stick to it. I still have my sliderule as well but don’t use it except the little one in the truck I use to check my gas mileage though I mostly do it in my head. Still don’t trust that computer in the truck.
I do gas mileage in my head too. The truck display always says it’s getting about 1 mpg better than it actually is.
My old Pickett slide rule is in a desk drawer, but I haven’t actually used it in years. I also used to have a little plastic one for gas mileage, I think it’s in a box of small junk now. Somebody’s going to have a lot of fun sorting through everything after I die.