Calculators, calculating fixed numerical, such as abacus, had existed since ancient Greece. In 1623, Wilhelm Schickard designed the first mechanical calculator in the world, but he did not complete. Then in 1642, Blaise Pascal designed and built the first mechanical calculator that can work, called Pascaline. Ada Lovelace assisted Charles Babbage to design Difference Engine in the Victorian era. About 1900, punched cards machines came out. But these machines are limited to only one complete single task. In 1940s, with the invention of the newer and more powerful computers, the term, computer, is used to indicate the temporal machines. The concept of computer was more clear. It was even used for mathematical calculations. The field of computer science also extended to the study of computers. From 1950s to the early 1960s, computer science became an independent discipline. In 1962, Purdue University established the first degree in computer science in the world. With the development of computer applications, many computing applications slowly became into the different areas of research in their own ways.
References: http://en.wikipedia.org/wiki/Digital_revolution
http://en.wikipedia.org/wiki/Information_Age
http://en.wikipedia.org/wiki/Internet
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