1, information management. Including data collection, storage, processing, classification, collation, retrieval and release. Information management has been widely used in office automation, enterprise computer-aided management and decision-making, information retrieval, library, film and television animation design, accounting computerization and other industries.
2. Process control. The computer is used to collect and analyze data in real time, and the controlled object is automatically adjusted or controlled according to the optimal value. Computer process control has been widely used in machinery, metallurgy, petroleum, chemical industry, electric power and other departments.
3. Assistive technology. Including computer-aided design, computer-aided manufacturing and computer-aided teaching.
4. Computer network. It is a system composed of some independent computers with information exchange ability, so as to realize resource sharing. Such as the use of bank credit cards nationwide, the use of trains and ticket systems. You can browse, retrieve information, send and receive e-mails, buy goods and realize telemedicine services on the world's largest Internet.
Extended data:
A complete computer system includes two parts, namely hardware system and software system.
1, the power supply is an indispensable power supply equipment in the computer, and its function is to convert 220V alternating current into DC used in the computer. Its performance directly affects the stability of other equipment, and then affects the stability of the whole machine.
2. The motherboard is closely connected with all parts of the computer, and all parts transmit data through the motherboard. In other words, the important "transportation hub" in the computer is on the motherboard, and its stability affects the stability of the whole machine.
3. The main function of 3.CPU is to interpret computer instructions and process data in computer software. CPU consists of arithmetic unit, controller, register, cache and bus for data, control and status.
4. Memory consists of circuit board and chip, which is characterized by small size, high speed, power storage and no power clearing, that is, the computer can store data in the memory when it is turned on, and the data in it will be automatically cleared after it is turned off.
5. Hard disk belongs to external memory, and it is made of metal disk, which has memory function, so the data stored on the disk will not be lost no matter whether it is turned on or off. The hard disk capacity is very large, reaching TB level.
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