Hackaday: Sliderule Simulator Teaches You How To Do Calculations The Old Fashioned Way. “Ever wanted to know how engineers made their calculations before digital calculators were on every workbench? [Richard Carpenter] and [Robert Wolf] have just the thing—a sliderule simulator that can teach you how to do a whole bunch of complex calculations the old fashioned way!”

https://rbfirehose.com/2026/02/21/hackaday-sliderule-simulator-teaches-you-how-to-do-calculations-the-old-fashioned-way/