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 handheld electronic symbolic ...

Although the calculator of the future may resemble a handheld computer, Hewlett-Packard has decided that now is not the time to merge the two. The company has pulled the plug on Xpander, a graphing ...

In 1966, there were no cheap, reliable keyboards. The keyboards that did exist were too bulky and expensive to work for the calculator. Jim Van Tassel took on the task of designing a small, ...

In the course of the 1970s, handheld electronic calculators transformed the way tens of millions of people did arithmetic. Engineers abandoned slide rules, business people gave up desktop calculating ...