KENDRIYA VIDYALAYA SANGATHAN JAMMU REGION . STUDY/SUPPORT MATERIAL 2011-12 CLASS: XII Computer Science ACKNOWLEDGEMENTS Chief Patron Shri Avinash Dikshit Commissioner KVS‚ New Delhi Patron Shri P. K. Koul Assistant Commissioner KVS‚ Jammu Region Guidance
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COMPUTER CONCEPTS A computer is a machine that processes data and performs tasks according to a set of instructions. To do anything‚ computer must be give specific directions to follow. They get these directions from software. Software‚ such as that used for word processing‚ is a set of step-by-step instruction for the computer‚ written by computer programmers in a programming language like BASIC‚ Pascal‚ or C. Computers also get instructions from you‚ the user. When you use the mouse (more
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EVOUTION OF COMPUTERS The evolution of electronic computers over a period of time can be traced effectively dividing this period into various generations. Each generation is characterized by a major technological development that fundamentally changed the way computers operated. These helped to develop smaller‚ cheaper‚ powerful‚ efficient and reliable devices. Today‚ life has become indispensable without a computer. You find computerization in almost every sphere and industry. Computer evolution
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EN 110 AI Mr. Schuh 10/15/14 Computer Computer is the most amazing gift of science. Almost everyone have one or more computer. This device was developed by Charles Babbage. Computer is a part of our life today. Computer can be used on many thing like school‚ business‚ government and etc... we can see computer anywhere we go around the world. Computer is so amazing with many functions. Four basic function if computer are input‚ processing‚ output and storage. Input collectively refers to all the
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Mnemonic Devices Mnemonic devices are techniques for improving memory. Many were developed in ancient times when written records were scarce or non-existent and people relied heavily on their memories to impart information. Mnemonics do not simplify information‚ they actually make it more elaborate‚ but this enhances organisation‚ and therefore retrieval‚ of information. Acronyms These are pronounceable words formed from the first letters of the list of words to be remembered‚ and are a type
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Uses of Computers in different Fields Our daily encounters with and dependence upon technology is almost invisible as it takes the shape of electronic climate control system‚ wireless communication systems such as phones and pagers‚ automatic tellers to dispense money. Magnetically striped cards to facilitate consumer transactions‚ cable and satellite television‚ auto mobiles and mass transit. Free trade agreements have led to globalization of commerce and scientific debate about global
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have done research on the Internet. E. Preview of Main Points: 1. First‚ I will define ecstasy 2. Second‚ I will discuss the effects of using ecstasy in different terms and the signs of its usage 3. Third‚ I will preview who could be an ecstasy user 4. Fourth‚ I will illustrate some treatment options 5. Finally‚ I will discuss the things that help to prevent ecstasy use and the conclusion II. From the various kinds of drugs appeared‚ the use of ecstasy considered the most dangerous drug on
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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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Non-volatile Storage: The data which is stored in those devices is not lost when the power is switched off. The data is retained. 2. Voluminous data: We can store volumes of data and instructions in these devices. This makes these devices very useful. 3.Relatively Cheaper: These storage devices are relatively cheaper and cost effective than primary memory of the CPU. 4. Portable: These devices act as a portable media for transferring data from
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Literary Device Glossary Allusion: An implied or indirect reference to a person‚ event‚ or thing that has to do with another part of a text. Can be direct quotes or it can be indirect things that are implied. Most are from commonly known pieces of literature or history. Example: “but now he found that he committed himself to the following of a grail” The Great Gatsby by F.Scott Fitzgerald. Function: In this example‚ Fitzgerald alludes to the Holy Grail. What this does is show how
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