Computer, also known as computer, is a machine that uses electronic principles to process data according to a series of instructions. A computer can perform both numerical calculation and logical calculation, and it also has the function of storage and memory. It is a modern intelligent electronic device that can run according to the program and automatically process massive data at high speed. The first universal computer, ENIAC, was born in February 1946. On May 24th, 954, the transistor electronic computer was born.
A computer consists of a hardware system and a software system, and a computer without any software installed 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.
Main structure:
Host: motherboard, CPU (central processing unit), main memory (memory), expansion card (some motherboards such as graphics card, sound card and network card can integrate these), power supply, optical drive, secondary storage (hard disk) and floppy drive.
Peripheral: monitor, keyboard, mouse (speaker, camera, external modem, etc. )
Precautions for using the computer:
1. It is forbidden to use other electrical appliances, hand warmers and other personal electrical equipment on special power sockets for computers. Before you leave from work, you should check whether all computer equipment is turned off.
2, the computer can't move when working;
3. When the computer is working, don't plug and unplug the equipment, turn it on and off frequently, plug and unplug all interfaces (except USB interface) with electricity, which is easy to burn out the interface card or cause damage to the integrated block;
4, anti-static, anti-dust, can not let the keyboard, mouse and other equipment into the water.