Decades have passed since the pocket calculator relegated the trusty slide rule to near obscurity. Now, an exhibit celebrates the lengthy history of the device, featuring the slide rules of ...

The new HP-35, the world’s first handheld scientific calculator, virtually made the engineering slide rule obsolete. It was HP’s first product to contain both integrated circuits and LEDs.

Before the smartphone, the laptop and the pocket calculator, there was a powerful mechanical computer. Our new series, Tools of the Trade, begins with a look at the slide rule.

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 9-1/2 inch paper linear 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 rectangular white plastic slide ...

Anyone who has used a slide rule knows there are side benefits that modern calculators and computers don’t provide.

This article was originally published with the title “How to Use the Slide Rule” in Scientific American Magazine Vol. 99 No. 25 (December 1908), p. 455 doi:10. ...