You have to really like slide rules to build your own ... If you’ve ever tried to manually draw an axis using a computer program — attempting to automatically set reasonable tick marks ...

A 1930s high school class making electrical calculations on their slide rules. Note the demonstration-sized rule hanging on the blackboard. Keuffel & Esser Co., Drawing Instruments and Materials for ...

Around here we mostly enjoy slide rules. We even have our own collections including some cylindrical and circular ones. But [Mathologer] discusses a recent Reddit post that explains a circular ...