1.CPU (Central Processing Unit) is a very large scale integrated circuit with many pins, which is the core of a computer. It is the core of computer operation and control, dealing with the operation of all kinds of information, just like people need to use their brains to calculate math problems.

2. Motherboard is one of the most basic and important parts of computer. Its function is to install various components and peripheral devices on it to form the main circuit system of the computer. To put it bluntly, many components need to be connected by the motherboard to form a whole and be responsible for coordination.

3. Memory is also the main part of the computer, where you usually open the computer to run programs. The program in a computer runs in memory, so its size has a great influence on the operation of the computer.

4. Hard disk is the storage medium of computer, and computer systems and data (such as music, documents, movies, pictures, software and other data) are stored on the hard disk of computer. At present, there are mainly mechanical hard disks and solid-state hard disks.

5. CD-ROM drive is a machine used by computers to read and write CD contents, that is, to play VCD and DVD. If it is a burner, you can also burn a CD.

6. Power supply provides power supply guarantee for all parts of the computer and is an important part of the computer. The mainframe of the whole computer is powered by the power supply, and the quality of the power supply is related to the stability of the whole machine.

7. Chassis is a part of computer accessories. Its function is to store and fix all computer accessories. To put it bluntly, it is to fix the computer motherboard, cpu, memory, hard disk, optical drive and so on. Put them together to protect them.

8. The display is used for the output and display of host information. It is a display tool, which displays some electronic files on the screen through a specific transmission device and then reflects them to human eyes. To put it bluntly, it is used to display images, like a TV set.

9. The graphics card undertakes the task of outputting and displaying graphics. You may find that your computer doesn't seem to have a graphics card. That's because what you bought is integrated, that is, the existing graphics card is integrated on the motherboard or cpu, and now it has been verified. Generally, people who have higher requirements for 3D will buy discrete graphics cards, such as playing games.

10. Sound cards, network cards, cables and speakers, sound cards and network cards are generally integrated on the motherboard, and ordinary users generally don't buy them independently unless professional people can use high-quality sound cards.

Computer, commonly known as computer, is an electronic computer for high-speed calculation, which can be used for numerical calculation, logical calculation and memory storage. It is a modern intelligent electronic device that can run according to the program and automatically process massive data at high speed.

It consists of hardware system and software system, and a computer without any software is called bare metal. It can be divided into five categories: supercomputer, industrial control computer, network computer, personal computer and embedded computer. More advanced computers include biological computers, photonic computers and quantum computers.

John von neumann, the inventor of the computer. 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, forming a huge computer industry, promoting global technological progress and triggering profound social changes. Computers have spread all over ordinary schools, enterprises and institutions, entered the homes of ordinary people and become an indispensable tool in the information society. The application of computers is becoming more and more common in China.

After the reform and opening up, the number of computer users in China has been increasing, and the application level has been improving, especially in the fields of Internet, communication and multimedia. From 1996 to 2009, the number of computer users increased from 6.3 million to 6,765,438+million, and the number of networked computers increased from 29,000 to 59.4 million. The number of netizens has reached 3160,000, and there are 670 million mobile users of wireless Internet, among which the number of mobile Internet users has reached1.170,000, ranking first in the world.