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.

You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly. Do you know how to use it? Really? All the scales? That’s what we thought.

When the apocalypse finally arrives, those with the booksmarts will be the upperymen. Maybe somebody you know will be the readerwriter and maybe somebody you know will learn how to make the brandywine ...

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 ...

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 ...

The slide rule was the most convenient calculator available to builders and scientists until the development of electronic calculators a few years ago. They also made great looking tie clips. Scottish ...

The best rules are ones that are clear and leave little room for interpretation. Such rules are the foundation of baseball and the reason the game works. Here are some examples. Rule 1.05: The ...

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 ten-inch aluminum duplex linear ...

An early computing device invented by Reverend William Oughtred in London in the 17th century. Primarily for multiplication and division, the slide rule has two stationary sets and one sliding set of ...