It is no secret that we like slide rules around the Hackaday bunker, and among our favorites are the cylindrical slide rules. [Chris Staecker] likes them, too, and recently even 3D printed a version.

A third edition, soft cover textbook titled, Slide Rule: How to Use It (Barnes & Noble Everyday Handbooks Series #254), by Calvin C. Bishop. The soft cover book has glossy front and back paper covers.

Unless you are above a certain age, the only time you may have seen a slide rule (or a slip stick, as we sometimes called them) is in the movies. You might have missed it, but slide rules show up in ...