I was cleaning out my home directory and forgot I had this stuff. It’s a collection of Java based slide rules (Java code by Eric Ross and Stefan Vorkoetter, used by permission). I also have a decent collection of slide rules and not so long ago used my flagship rule, a Kueffel and Esser Decilon, to do two years of differential and integral calculus.
I haven’t had to use the calculus for three years, though. I couldn’t integrate a problem today if my life depended on it. That concerns me. It cost a lot of time and effort to get that knowledge into my head.
I can’t be the only one to experience this. What did you do about it?
