In our world,there have been a lot of inventions,such as computers .The computer is in twentieth Century the most advanced science and technology inventions, has extremely important influence on the production of human activities and social activities, and with the rapid development of powerful vitality.
And its application field is extended from the initial military scientific research applied to each field of the society, has formed a large scale computer industry, promote the technological progress worldwide, which triggered a profound social change, the computer has been in general schools, enterprises and institutions, into the homes of ordinary people, become an indispensable tool in the information society.The main features of:1. computing speed of 2 high accuracy 3 logic operation ability 4 big storage capacity of 5 high degree of automation.
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