Student of group 961-21 Babadjanov Jamshid English lesson Self studies

Student of group 961-21 Babadjanov Jamshid English lesson Self studies
Topic-2
Input and output devices


A computer is a general purpose device that can be programmed to carry out a set of arithmetic or logical operations. The computer is one of the 20th century's most advanced sciences and technology invention, for the production of human and social activities had a very important influence, and the rapid development of a strong vitality. Its applications extend from the initial military research applied to all areas of society, has formed a huge computer industry, led the worldwide technological progress, which triggered a profound social change, computers throughout the school in general, corporate institutions, into the homes of ordinary people, become an indispensable tool in the information society. It is an important symbol of mankind has entered the information age. With the proposed development of the Internet, computers and other technologies once again set off a revolution in information technology, according to the definition of Chinese school-enterprise networking Union, almost all things technology and computers, combined with the current Internet technology, between the object and the object to achieve environment and real-time status information sharing and intelligence gathering, transmission, processing.
Components of Computer
Input Device
The input device is any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact with it, much like a TV. Examples of input devices are keyboard, webcam scanner, video capture device and mouse. When the people use keyboard to typing, the keyboard will send the data to computer, the word will be show into the monitor.
Output Device
Output devices such as a monitor or printer make information you input available for you to view or use. A display device is an output device that visually conveys text, graphics, and video information. Information shown on a display device is called soft copy because the information exists electronically and is displayed for a temporary period of time. Display devices include CRT monitors, LCD monitors and displays, gas plasma monitors, and televisions.
System Unit
System unit is the main part of a desktop computer and it is also known as “chassis” or “tower”. It is the housing that is used for protecting and organizing all the components in the system unit that makes up a computer. System unit includes Motherboard, CPU, RAM, Hard Disk, Video Card, Sound Card and other components but does not include keyboard, mouse and other peripheral devices. In this section, I will explain and illustrate the electronic components in the system unit along with their functions.
Working in computer
The computer does its primary work in a part of the machine we cannot see, a control center that converts data input to information output. This control center, called the central processing unit (CPU), is a highly complex, extensive set of electronic circuitry that executes stored program instructions. All computers, large and small, must have a central processing unit. The central processing unit consists of two parts: The control unit and the arithmetic/logic unit. Each part has a specific function. Like input devices are used to input information to computers. Generally, the input devices send information to memory (RAM) and the processor or central processing unit processes the information and output devices shows it.

Conclusion
In my opinion, I think all the unit of computer component are important and their own role in getting a computer system unit to function. Input devices are used to input information to computers while output device transmit information to one or more users. Central processing unit carries out the basic operations or processes. Finally, all components are required for a system unit to function. All the components are connected to the motherboard which is mounted on the casing. If one is missing, the computer will become the system error or cannot working at anytime.
Complete Input, Output and I/O Devices of Computer, With Examples
There are many input and output devices of the computer. These are a vital part of the computer to carry process throughout the computer. With the input and output devices of the computer, the system wouldn’t fully fill the needs of the user.
Most devices of computers either be input devices or can be output devices, as they can only accept data input from a user or output results displayed by a computer particularly.
However, some devices can accept input and display output at the same time, and they are known as I/O devices (input/output devices). Let’s go through the Examples.