Mechanical era

 Mechanical era

John Napier introduced logarithms.
In 1642 Blaise Pascal created the calculator.
In 1694 Goottfried Wilhem von Leibniz created a machine that could also multiplicate.
In 1822 Charles Babbage created a machine to perfom differential equations, called a Diference Enginee.
Ada Augusta Lovelace created the first programme.