Computer (full name: the electronic computer; nickname: PC) is the 20th century's greatest science and technology inventions. Its inventor John von Neumann. It does not require manual intervention to quickly carry out a variety of digital information electronic equipment of the arithmetic and logic operations, a microprocessor core, coupled with large-capacity semiconductor memory and a powerful programmable interface chip, and even peripherals (including keyboards, monitors, scanners, printers and floppy drives, optical drives and other external memory) and power the computer, known as micro-computer referred to as a microcomputer or computer, sometimes referred to as PC (Personal Computer) or MC (micro computer). Computer plus system software, constitutes the entire micro-computer system (MSC, referred to as computer systems).
The computer is from the development of early electric calculator. 1946, the world's first electronic digital computer, the ENIAC ", used to calculate the trajectory, manufactured by the University of Pennsylvania Moore School of Electrical Engineering. The ENIAC huge volume, covers an area of more than 170 square meters, weighing about 30 tons, consumed 150 kilowatts of electricity. Obviously, this computer is costly, inconvenient to use.
In 1956, the transistor computer was born, this is the second generation of electronic computers. As long as several large cabinets can only put it, the operation speed also greatly improved. 1959 is the third-generation integrated circuit computer. The first computer invented by John von Neumann (who was then the computing power equivalent to the current calculator), three of the Treasury, after the gradual development.
Computer human activities and social activities to produce an extremely important influence on the rapid development and strong vitality. Its area of application extended from the initial military application of scientific research to society in various fields, has formed a large-scale computer industry, led to worldwide technological progress, which led to profound social change. Computers throughout the schools, enterprises and institutions, into the homes of ordinary people has become an indispensable tool in the information society. It is an important symbol of one of mankind enters the information age.
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