For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents 1. Introduction .......................
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PRELIM COMPUTER What is a Computer? A computer is an electronic machine that can be programmed to accept data (input)‚ process it into useful information (output)‚ and store it in a storage device for future use Characteristics of a Computer •It’s a machine. •It is electronic. •It is automatic. •It can manipulate data. •It has memory •It has logical function Capabilities of a Computer • Speed • Accuracy • Repetitiveness • Storage • Programmable Limitations of a Computer • Cannot operate without
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of the military and industry in the development of electronics‚ computers‚ and information theory. After the 1940s‚ the military remained the major source of research and development funding for the expansion of automation to replace manpower with machine power. Since the 1950s‚ four generations of computers have evolved. Each generation reflected a change to hardware of decreased size but increased capabilities to control computer operations. The first generation used vacuum tubes‚ the second used
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Effect of computer addiction Computer addiction‚ our world is surrounded by technology and we use technology to almost everything‚ our world has gotten so used to tehcnology around us we cannot imagine a life with it‚ though it can come handy it still has its negative effects. Computer addiction is common nowadays beacuse we cant imagine living a life without technology‚ we use computers for almost everything.Parants usually buy their kids computer to study but teenagers often find a
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and paper tape‚ interaction via teleprinter-style keyboards became the main input device for computers. A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol. However‚ to produce some symbols requires pressing and holding several keys simultaneously or in sequence. While most keyboard keys produce letters‚ numbers or signs (characters)‚ other keys or simultaneous key presses can produce actions or computer commands
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“Typing is a process of entering the text matter into a device such as typewriter‚ computer‚ cell phone or calculator. Touch typing is a very efficient and popular technique for typing accurately and quickly on computer keyboard. Touch typing is basically a skill of typing without viewing the keys on keyboard. Many persons find it difficult because they have to look time and again on keyboard and the text on paper
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Usefulness of the computers To start with‚ we live in the 21th century‚ in other words in the era of a great progress in most aspects of our life. Every day scholars of the whole world make some new discovering‚ invent new technologies‚ and do difficult research. Day by day people realize that their life becomes almost impossible without using different technological devices‚ and what is most curious‚ even in their everyday life. Talking about such so called “vital devices” we mean mobile phones
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My computer My computer is a machine. Some hardware install in the computer. Like processor‚ RAM‚ motherboard‚ hard Disk‚ CD Rom. The windows Xp is install on my computer. I think it is best for me because I can easily understand any thing in the operating system. May peoples say Windows Xp it’s a user friendly operating system. I think they say right. Its content media player‚ typing document software‚ for the drawing tool Paint‚ users can easily enjoy‚ type document and create an artistic
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Have you ever thought how much time do you spend using on a computer in a day/week? Computers are as common in numerous households around the world. People from all age groups are learning to operate computers and anyone who has worked with computers for long periods of time knows that computers can be just as addicting as drinking every night of the week. Take further‚ Computer addiction can have a number of physical‚ social‚ and psychological effects on a person‚ and it is to be taken as seriously
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Computer Basics Ty Christian English Allied American University Short Response Discuss where a computer stores its basic hardware settings‚ why it does so‚ and what some of those settings are. A computer is a very complex and complicated piece of equipment that take teams of professional’s to manage. What people seem to forget is even this enigma of hardware also have a very basic system that fires it up. This is called the BIOS (Basic Input/Output System). As the name suggests
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