I like aviator styled watches. Some of them have a a dial on the outside that can be used to compute speed/fuel supply/Oil pressure, but I have never learned how to use these functions myself.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This slide rule belonged to Dr. Sally ...

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 ...