1895: Otto Steiger receives a patent for his Millionaire calculating machine. It may not have been fruitful, but it multiplied. Steiger, a German who lived in Munich, invented his machine in 1893. It ...

Forget the upcoming presidential election or Madonna's new movie. The next time you want to pick an argument with someone, tell them our country's schoolchildren should be using pocket calculators ...

This file type includes high resolution graphics and schematics. You can build an analog calculator using a pulse-width modulator (PWM) to perform accurate four-quadrant multiplication and division.

Calculators’ effectiveness in mathematics classes, long a source of debate, depends in large measure on students’ pre-existing knowledge of basic math, a recent study found. Researchers who examined ...