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 white plastic circular slide ...

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 yellow aluminum circular slide ...

While some (math-phobics) still may relish the simple beauty and non-threatening functionality of the abacus, there are those who have made the transition to more challenging computing gadgets—many ...

Around here we mostly enjoy slide rules. We even have our own collections including some cylindrical and circular ones. But [Mathologer] discusses a recent Reddit post that explains a circular slide ...

It was the only technological tool widely and continuously used for over three centuries. For math and science geeks it was a badge of honor, nestled neatly into a plastic pocket protector along with ...

I still use a slide rule. I find it very efficient, much more so than using a computer often times. But I find people at work constantly asking what that "funny looking ruler" is. <BR>A quick google ...

Torgoen has developed a pretty nifty watch, if you were born before the 50s and also had a stint at NASA. The Pilot Watch with Slide Rule features a circular slide rule that is “useful for units of ...

This is an early form of calculator. It is used by sliding one of the layers and then reading the corresponding answer on another part of the dial. This object was chosen by the children because it ...