We didn't have them to use...they existed, but were prohibitively expensive. I saw my old slide rule in my parents' basement a few years ago, and couldn't remember how to use it.
>>I saw my old slide rule in my parents’ basement a few years ago, and couldn’t remember how to use it.<<
I’ve got two of them in the bookcase behind me and amazingly I can still use them .......... if I’m wearing my glasses. LOL
In elementary school I was accused of cheating for using my slide rule to VERIFY my longhand division results! Didn't matter that I had it all down on paper before I pulled out the slipstick.