In 1642, Blaise Pascal, while only eighteen years old invented a device to help his father who worked as a tax collector do his job. Pascal invented one of the first calculators called the Pascaline. The Pascaline was only able to do addition with ease. It used 8 dials to add numbers up to 8 figures long. As one dial moved to 10 notches it moved the next dial up a notch. The photo to the right is an actual Pascaline signed by Blaise Pascal himself.