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Computer History
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Adding machine
Blaise Pascal invents an adding machine which he calls the Pascaline. It could perform addition and subtraction, but it was too expensive to be practical and only Pascal could keep it working -
Calculator
Samuel Morland builds a mechanical calculator that will add and subtract -
Addition
Gottfried Leibnez, the man to blame for the invention of calculus, uses a stepped cylindrical gear to build his "Stepped Reckoner" which will both add and multiply -
Mathematics
Leibniz introduces binary mathematics -
Calculation machines
Phillip-Malthus Hahn builds and sells a small number of calculating machines which are accurate to 12 digits -
Calculator
The third Earl of Stanhope invents a multiplying calculator -
Automated loom
Joseph-Marie Jacquard invents an automated loom which uses punched cards to reproduce complex patterns. -
First mass produced machine
The first mass-produced calculating machine, Thomas de Colmar's Arithmometer, is marketed and continues in use for many years.
