[KC Burke]

What is interesting is that no one makes them anymore. Real traditional slide rules sell used for $200 to $800.

[Bounced2X]

I don't have a slide rule anymore. Don't know what happened to it. I would have to refresh on how to use it anyway.
I remember when I very young people who worked cashier registers had to quickly figure out how much to change to give you. Many of the old models still in use didn't do it for you. They didn't have calculators in them yet.