Even machinists work in 1000's of an inch............

Although that may not be the case all of the time, hundredths of an inch will not be sufficient in most designs. Engineers design things within certain tolerances. Machinists must make them to the specs.

Besides, why would a computer programmer even think of using ANY slide rule? It is a cute program, but I would not use it to calculate anything crucial.

First you have to convert the number to a decimal and then remember to put the places back to a number that could be off by .01 at best. That leaves a lot of leeway that engineers could not tolerate.

I went to a great engineering college. We hated the old slide rules! But you were required to have them back then. We had no access to the mainframes running back then.

Computers now have many of the old function tables built in also. So why not get the accuracy right from the get go? Computers do not Guess!

Ted

PS: How many years ago did you take Calculus and what grade level?