In February 1972, the first relatively affordable and hand-held electronic calculator was made available, for scientists only, priced at $395. Hewlett Packard's HP-35 was the first handheld calculator ...

The protractor and the Bunsen burner. Playing the recorder in music class. Drawing arcs and circles with a compass in geometry. These tools of the education trade become part of our lives for a ...

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 ...

The SuperCool Slide Rule is a compilation of four different HVAC slide rules. It performs superheat and subcooling calculations for both R-22 and R-410A, and contains the most comprehensive duct ...

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 rectangular yellow, orange, ...

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 large cylindrical slide rule ...

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 ...

Soon will come a day when you’ll meet a brilliant conversationalist at a party and have no idea that you’re talking to an implanted computer chip. Whenever you hear a person wishing for ice and snow, ...

An appreciation of watches often takes you back in history. That is especially the case when you find yourself asking "what is that for?" A commonly misunderstood feature on some pilot watches is the ...

In 1966 I went to Leeds University to study Electrical and Electronic Engineering. At an introductory lecture from the Professor, we were told we would need a slide rule for the course. It was ...