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locations, or to an area (such as a boundary for a municipality). Through this geoparsing process, latitudes and longitudes are assigned to the found places, and these latitudes and longitudes are indexed for later spatial query and retrieval. This can enhance the search process tremendously by allowing a user to search for documents within a given map extent, or conversely, plot the location of documents matching a given keyword to analyze incidence and clustering, or any combination of the two.

Vertical search engines or specialized search engines are also becoming big. These search engines specialize in specific content categories or search within a specific medium. Popular search engines, such as Google or Yahoo, are very effective when the user searches for web sites, web pages, or general information. Vertical search engines enable the user to find specific types of listings, thus making the search more customized to the user's needs.

Next category of search engines is media focused search engines: This type of search engines search for sites, pages, and other online content relevant to a specific area or category. Vertical search engines falling into this category include shopping search engines (such as Froogle or NexTag), government search engines (such as "Google US government search" and searchgov.com), legal search engines (such as law.com and lawcrawler), travel search engines (such as Travelocity and Expedia), financial search engines (such as Business.com and Hoovers), business search engines (such as knuru) and many others.

To sum it all, as long as people need information and there is a vast array of available information, the search engines are here to stay. They are the best and the fastest way to get around the Web and find the needed information. A Web without the search engines would be a chaos that is impossible to imagine

Sources:
www.wikipedia.c om
http://www.ogilvy.com

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