What are the main functions of a computer? The main functions of computer network are: 1) resource sharing; 2) communication and cooperation; 3) Improve the reliability of resources. First of all, it depends on what computer you are referring to. If it is an ordinary home computer, it is generally used for entertainment, study and simple work. Entertainment: you can play games, enjoy movies and music, read e-books, keep a diary and so on; Learning: learning computer hardware knowledge, various operating systems, applications, professional knowledge and so on; Work: edit and modify documents, write music scores, process photos, and if your computer is powerful enough, it can also be used as a small graphics or video workstation; When your computer is connected to the Internet and equipped with digital cameras, printers, fax machines and other peripheral devices, these functions can be greatly expanded. The key function of computer lies in expansion and mining. If you don't want to use it, it can do nothing, mainly calculation, but it has too many functions after being developed.
Question 2: What do you mean by the function of the computer? You asked about the Bios. System boot BIOS, the basic input and output system of microcomputer, is a ROM chip integrated on the motherboard, which stores the most important basic input and output programs, system information settings, power-on self-check programs and system boot bootstrap programs of microcomputer system. On the motherboard, you can see the BIOS ROM chip. Press the delete key to enter the settings.
If it is DIOS, it may be a distributed input-output system?
Question 3: The function of+-×÷ on the computer is equivalent to four operations in elementary mathematics, which correspond to addition, subtraction, multiplication and division respectively.
Question 4: What are the main uses of computers?
1. Numerical calculation. Computers are widely used in the calculation of science and engineering technology, which is a basic aspect of computer application, and we are familiar with it. Such as: the calculation of satellite orbit, the calculation of various parameters of missile launch, the calculation of seismic strength of buildings, etc.
Second, data processing. It is called data processing to record, sort out and calculate the data in time by computer and process it into the form required by people. Compared with numerical calculation, the main characteristics of data processing are more raw data, large processing capacity and strong timeliness, but the calculation formula is not complicated. Today, with the popularization of computer applications, computers are no longer just tools for scientific calculation, but are more used for data processing. Such as: factory production management, planning and scheduling, statistical reports, quality analysis and control; In the financial department, accounts are registered, classified, summarized, counted and tabulated by computers. We can't use computers to realize office automation. It is faster, more efficient and more convenient to use computers for text input, typesetting, plate making and printing than traditional movable type printing. Through computer communication, that is, data exchange through local area network or wide area network, it is convenient to send and receive data reports and faxes.
Automatic control. Automatic control is also an important aspect of computer application. In the production process, automatic control by computer can greatly improve the quantity and quality of products, improve labor productivity, improve people's working conditions, save the consumption of raw materials and reduce production costs.
Question 5: What are the characteristics and functions of computers? Features of computer: high speed, high precision and large storage capacity.
Functions of the computer:
Data processing function
The computer data processing function mainly completes the tasks of data organization, processing, retrieval and operation. These data can be obtained in many forms, and the demand for processing is also very extensive.
Data storage function
The function of computer data storage is mainly to save all data that need computer processing on computer storage media, including system file data needed for computer operation.
Data transmission function
A computer must be able to transfer data between the inside and the outside. The operating environment of a computer consists of various devices used as data sources or purposes. When data is sent from one device to other external devices, it is directly related to the computer. This process is the input and output process. When data is transmitted from local to remote equipment or from remote equipment to local equipment, a transmission process, that is, a data communication process, is formed.
control function
In the computer system, the control unit manages the resources of the computer and coordinates the operation of its functional components to respond to the requirements of instructions. Its data processing function, data storage function and data transmission function are controlled by computer instructions.
Question 6: What are the functions of computer programs? A computer program or software program (usually called a program) refers to a set of instructions that indicate each step of a computer, usually written in a programming language and running on a certain target architecture. For example, a program is like a braised pork recipe (program) written in Chinese (programming language), which is used to guide people who know Chinese (architecture) to cook this dish. Usually, computer programs should be compiled and linked into a format that is not easy to be understood by people but can be understood by computers, and then run. Programs that can run without compilation are usually called script programs.
Question 7: What are the three functions of computer network? 20 minutes (1) data communication: The computer network mainly provides data communication services such as fax, e-mail, electronic data interchange (EDI), bulletin board system (BBS), remote login and browsing.
(2) Access to resources: All users accessing the network can enjoy all or part of the software, hardware and data resources of each computer system in the network.
(3) Improve the reliability and availability of computers: every computer in the network can become a backup machine through the network. Once a computer breaks down, its tasks can be completed by other computers, which can avoid the phenomenon that one computer breaks down and the whole system is paralyzed in the case of clicking, thus improving the reliability of the system. When one computer in the network is overloaded, the network can give new tasks to idle computers to balance the load, thus improving the availability of each computer.
(4) Distributed processing: large-scale synthesis problems are handed over to different computers for simultaneous processing through algorithms. Users can reasonably select network resources according to their needs and deal with them quickly nearby.
Question 8: What are the functions of computer peripherals? External devices are called "peripheral devices", which refer to hardware devices connected outside the computer host. It plays the role of transmitting, forwarding and storing data and information, and is an important part of computer system.
With the rapid popularization of computer application and the increasingly extensive application of network and information technology in China, the market demand for computer peripherals is increasing, which has promoted the formation and rapid development of China's computer peripheral industry. Now some products have formed large-scale production, occupying a certain market share. It is predicted that in the next few years, China's computer peripheral equipment industry will make continuous progress in researching and developing independent core technologies, cultivating independent brands, improving product cost performance, expanding production scale and increasing industry application solutions, which is expected to compete with international brands in some product fields.
Due to the variety of external devices, some of which have multiple functions, it is difficult to accurately classify external devices so far. According to different functions, it can be roughly divided into five categories: input device, display device, printing device, external memory and network device.
input device
An input device is a device for human or external interaction with a computer, and is used to input raw data and programs for processing these data into the computer. Now, computers can receive all kinds of data, including numerical data and non-numerical data, such as graphics, images and sounds. These data can be input into computers through different types of input devices for storage, processing and output.
Display device
In computer output devices, display devices are equivalent to our eyes. We need to know whether the operation is correct and what the result is, usually through the display device to observe. At present, computer display equipment mainly includes CRT display, LCD display, plasma display and projector. CRT monitors and LCD monitors are mainly used in microcomputers.
PRN device
The printer is one of the output devices of the computer, which prints the operation results or intermediate results of the computer on paper in a specified format with numbers, letters, symbols and graphics that people can recognize. There are many types of printers, which can be divided into impact printers and non-impact printers according to whether the printing elements impact the paper. According to the structure of printed characters, it can be divided into full-angle character printers and dot matrix character printers; There are serial printers and line printers according to the way a line of words is formed on paper; According to the technology adopted, it can be divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic and LED printers. There are three indicators to measure the quality of a printer: printing resolution, printing speed and noise.
External memory
An external memory is a device for storing information that is not directly related to the arithmetic unit in a computer, such as instructions and data. At first, it was mainly used to expand the capacity of computer memory, but with the change of computer architecture, it later became an indispensable part of the random storage system of online timing and time-sharing system. Most information such as software and data were stored in high-speed external memory.
External memory can save information for a long time without relying on electricity to save information. But it is driven by the mechanical part, which is much slower than the memory. The external memory does not directly exchange information with the arithmetic unit and the controller, but under the control of the processor, it sends the required data and programs to the memory at any time through the external control component, and stores the results in the operation process. This solves the contradiction between speed, capacity and cost.
Online booking
In order to transmit information quickly and accurately, enjoy resources and improve the utilization rate of computers, many computer systems are often connected to computer networks through special equipment and communication lines. With the rapid development of computer technology, computer network has penetrated into all fields of society and is closely related to our lives. The network controls the development of social economy, and also makes great changes in people's work and lifestyle. When computers are connected to computers and workstations are connected to servers, five types of intermediate devices, such as network transmission medium interconnection equipment, network physical layer interconnection equipment, data link layer interconnection equipment, network layer interconnection equipment and application layer interconnection equipment, are needed in addition to the connection medium.
Question 9: What is the main function of the computer's memory? Memory is the storage device of computer, and its main function is to store programs and data. Program is the basis of computer operation, and data is the object of computer operation. Both programs and data are represented in binary form in memory, collectively referred to as information.
In a computer, the memory capacity is in bytes (abbreviated as B), and a byte consists of eight binary bits. In addition to bytes, there are KB, MB, GB and TB (which can be abbreviated as K, M, G and T respectively, for example, 128MB can be abbreviated as 128M). In which: 1KB= 1024B, 1MB= 1024KB, 1GB= 1024MB,1TB =/kloc-0.
Memory is generally divided into main memory (memory) and auxiliary memory (external memory). The composition of the memory is shown in the figure.
Random access memory
Main memory (memory)
Read-Only Memory
Storage; stock
hard disc
Auxiliary storage (external storage) floppy disk
laser record
other
Figure 1. 1.2 Composition of memory
The main memory is directly connected to the CPU and stores the currently running programs and related data. The access speed is fast, but the price is expensive and the capacity cannot be too large. At present, the memory configuration of microcomputer is generally 128MB or 256MB.
Main memory is divided into random access memory (RAM) and read-only memory (ROM) according to its working mode.
Data in random access memory (RAM) can be read or written randomly, and it is used to store programs and related data transmitted from external memory and data sent from CPU. What people usually say about memory actually refers to RAM.
Read-only memory (ROM) occupies a small part of main memory (memory), which is usually accessed by CPU and is generally used to store fixed and special programs or data.
The auxiliary memory stores programs and data that are not used by the computer for the time being (only transferred to the memory when necessary), and the access speed is relatively fast.
Slow, but the price is relatively cheap, and the capacity can be made great. For example, the storage capacity of a hard disk is usually tens of GB.
Auxiliary memory generally includes hard disk, floppy disk, optical disk, mobile hard disk, etc.