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Blaise Pascal
In 1642 the French mathematician Blaise Pacal made an Arithmetic Machine.He used it to count money.During the next ten years, Pascal made fifty more machines. -
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History
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German Leibnitz
In the 1670s, a German called Leibnitz continued Pascal's work and made a better machine .Leibnitz's machine was called the Step Rockoner.It could do much more difficult calculations that Pascal's machine only used two digits (0 and 1). -
Charles Babbage
In the 1820s, a British mathematician called Charles Babbage invented a machine that did very difficult calculations automatically. He called his machine a Difference Engine. -
Alan Turing
Alan Turing was born in 1912 in London. He studied mathematics at Cambridge University. In 1937, he created a new Machine he called Colossus. -
IBM
In 1957,IBM made a computer called the 610 Auto-Point. They said that it was the "first personal computer ". But it was not like the computers that millions of people have in their homes today. It was large and expensive. It was called a personal computer or PC, because it only needed one person to work it. -
Apple
In 1976, Steve Wozniak and Steve Jobs started and Apple Computer Company. In 1977, their second computer, the Apple 2, appared. It was popular, and the company made 7 million dollars! Personal computers were here to stay. -
Ada Lovelance
Ada Lovelace was still the first computer programmer in the world. In 1979, a modern computer programming language was named ADA. -
Windows 95
In 1995, the new operating system (Windows 95) came with a piece of software that let people use the internet. Soon millions of people were paying Microsoft twenty dollars a month to use the internet.
