Yep, I've still got a circular slide rule I bought in my high school bookstore. Cost me $2.50.
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Pickett N902-T Simplex Trig.What I really want is the one I saw in an engraving shop. Vernier positioning, about 3' long, and I think it was even temperature stabilized. High precision computing, for its time.
Yeah, it always brings back memories whenever I see the scene in the movie Apollo 13, where all the engineers pull out their slide rules and gather round to check the math of one of the Apollo astronauts.
Yes but, Google "how to use a slide rule" is what you shoulda done.
Or look over on the right under "RELATED" there are two instrucables about it.