1, the first generation, the second generation, the third generation of the main components of the computer are
1) The first generation computer, the first computer, was born in the University of Pennsylvania in the United States, named ENIAC, which was mainly composed of electronic tubes. Although the calculation speed was heavy and slow, it was similar to modern calculators, but it was a milestone of computer.
2) The second generation computer is mainly composed of transistors compared to the first generation, its computing speed has been accelerated and its life has been extended. The volume. The weight is obviously reduced.
3) The third generation of computers is mainly composed of small-scale integrated circuits. This generation of computers reduces the production cost of computers while greatly improving the computing speed of their life. Power consumption, volume and weight are greatly reduced. It is worth mentioning that the emergence of an operating system in this era makes it possible to popularize computers.
2. Electronic computers
computer, commonly known as computer, is one of the most advanced scientific and technological inventions in the 20th century, which has had an extremely important impact on human production and social activities and has developed rapidly with strong vitality. Its application field has expanded from the initial military scientific research application to all fields of society. Has formed a huge scale of the computer industry has driven the global scale of technological progress which has triggered profound social change computers have spread to schools, enterprises and institutions. After the reform and opening up, the number of computer users in China has been on the rise, especially in the fields of Internet communication, multimedia and other applications, and has achieved good results. From 1996 to 2009, the number of computer users increased from 6.3 million to 6,710 The number of networked computers rose from 29,000 to 59.4 million. Internet users have reached 316 million wireless Internet and 670 million mobile users, of which 117 million mobile Internet users are the first in the world.
The first generation of electronic computers is also called \"vacuum tube computers\". Electronic computer with electron tube as the main circuit element. So the core component is: electron tube.