Who Invented Calculators

By: Jake

French Blaise Pascal invented the calculator. He did this to help his dad who was a tax adjuster. Then Gottfried Leibnitz improved on Pascal idea with a machine that would add, subtract, multiply, and divide.

John Napierin invented the movable multiplication table engraved on a series of square section metal rods, called Napiers Bones.

We tend to take a cheap hand held calculator for granted. They're easy to use and it's hard to imagine life with out them. But not very long ago a hand held calculator was very expensive and very different from the ones we use today.

source: www.newmedianews.com/tech-hist/curta.html