Over the years, to overcome all this problem number of strategies and technologies are used. Goggling for a piece of information from internet throws at us mountains from which we have to find what we want. It has allowed information to grow with any control mechanism. Technology, to some extent has been responsible for aggregating the problem of information explosion. Given the sheer size of the web and the rapidity with which new information gets added and existing information changes, finding relevant documents could sometimes be worse than searching a needle in a haystack. Some estimate that the volume of information on the web is doubling every four months. Bright Planet estimates the deep-web to be 400 to 450 times larger, thus between 66,800 and 91,850 terabytes. The surface-web is about 167 terabyte as of summer 2003. It is estimated that in 2000 the volume of information on the public Web was 20 to 50 terabyte in 2003 the volume of information on the Web grew up to 167 terabytes at least triple the amount of information. The convergence of information technology and information science has paved the way for introducing many new services with the help of contemporary technologies. The change that is happening in the information industry over the years is astonishing.

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