21 October 2009

Pocket calculator

The invention: The first portable and reliable hand-held calculator
capable of performing a wide range of mathematical computations.
The people behind the invention:
Jack St. Clair Kilby (1923- ), the inventor of the
semiconductor microchip
Jerry D. Merryman (1932- ), the first project manager of the
team that invented the first portable calculator
James Van Tassel (1929- ), an inventor and expert on
semiconductor components
An Ancient Dream
In the earliest accounts of civilizations that developed number
systems to perform mathematical calculations,