Search Directories organize and index information from the World Wide Web according to subject classifications. Developers of search directories examine Web sites for subject content and place them in appropriate categories. Information provided is evaluated and selected. They are useful for identifying relevant sties on particular topics. Information provided is NOT evaluated, selected or organized.
Search engines can be very useful tools for finding specific pieces of information.
The meta-search engines search multiple engines simultaneously and retrieve information from every tool queried. Meta-search engines save searching time and provide a good overview of web documents meeting the search criteria. Search results, however, might contain documents that are not relevant to needed information. As some search engines are case sensitive, you need to set up the phrase search accordingly. This search will reduce your search results to an even greater extent.