Ask any professor, and they’ll probably tell you graphing calculators offer a plethora of mathematical uses, like plotting graphs, inputting trigonometric functions — you know, typical academic stuff.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Whether you’re a college student enrolled in a calculus course or a professional accountant with your own ...

Check out this geeky water-powered calculator. It uses three water batteries for power that have two electrodes inside made from a special alloy which, when immersed in water, produce electricity ...