Input and Output Devices in Computer

Input and Output Devices in Computer Name: THENG WEI JUN Question 1 A computer receives incoming data, processes them and produces an output. Hence, in a typical computer, there is An input device i.e, a key board A Central Processing Unit (CPU) I.e, a box and An output device i.e, a monitor or a Visual Display Unit (VDU). Discuss in detail how these devices work together to produce information. Introduction 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 centurys 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, alm ost 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 â€Å"chassis† or â€Å"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. Question 2 The Internet is a range of space where computers are connected to each other and they can access to information from ONE (1) place and apply that information to another place. Discuss in detail the advantages and disadvantages of internet in the education field. Introduction The Internet is a network of several computers communicate with each other using a common language connection is made, ie WAN, LAN and stand-alone international computer network communication protocol in accordance with certain composition. Internet began in 1969 in the United States is the carrier of a global network and a public information, which the mass media faster than any previous one communication medium. Advantage First point is encyclopedia, sometimes an encyclopedia may not always be available to students and they may have difficulty in gaining access to the books in the library. In that case, the encyclopedia of various subjects available on the Internet can be helpful. This is more useful for students who belong to communities not having English as their mother tongue. Kids and teenager can also be benefited by the Internet by using the pictures, videos, which is one of the major advantages, when comparing textbooks versus computer teaching or learning. Next, all the latest news constantly updated on the Internet on news sites. Students learning politic, can have an access to all the current affairs through the Internet in the college, at home, or at any other place. Example, if student want to know or search about historical accounts like speeches, biographies, etc., are also easily available on the Internet in detailed and accurate versions. No need to waste time or money finding in book shop or other place. In addition, another positive effect of Internet in education is the onset of distance education or online learning. With this facility, you can take up short-term courses with the course material available online, learn, and give exams. One of the benefits of online learning is that people from any part of the world can gain knowledge on different subjects, complete courses. Disadvantage One of the disadvantage of online learning is that Instructors will not be on hand or on campus and easily accessible to answer questions. While they may be available on email, thats not the same as having access to a living, breathing person and to be able to ask questions during a break or after class. While technology tools and the Internet infrastructure are becoming more and more stable, there are still instances when technology fails. Servers may be down, or you may experience periods when your connection to the Internet is interrupted. Hard drives fail, and email may get caught in spam filters and never be delivered. Its important to backup important class information and make certain that you have alternative ways to communicate. Working alone can isolate a student, making it easy to put off or neglect course work or drop out of an online class completely. It takes a certain amount of internal motivation to continue when youre pressed for time and dont have fellow students to talk with and help to motivate you along the way. Conclusion On my opinion, I think the invention of the Internet has both disadvantages and advantages. The disadvantages of using internet are that it has caused a lack of privacy and it has made it easier to commit crimes. The advantages of the internet are that it can be used for learning purposes and that it connects the world. Reference No.1 Jones, P. E., Wall, R. E. (1989). Components of computer anxiety.Journal of Educational Technology Systems,18(2), 161-168. Musen, M. A., Gennari, J. H., Eriksson, H., Tu, S. W., Puerta, A. R. (1994). PROTEGE-II: computer support for development of intelligent systems from libraries of components.Medinfo. MEDINFO,8, 766-770. Heninger, A. G. 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