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 consists of two white ...

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 ...

Before the smartphone, the laptop and the pocket calculator, there was a powerful mechanical computer. Our new series, Tools of the Trade, begins... The Slide Rule: A Computing Device That Put A Man ...

Most people have heard of or seen slide rules, with older generations likely having used these devices in school and at their jobs. As purely analog computers these ingenious devices use precomputed ...

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 ...