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Serious research into science and technology has a new tool called illumin8 that harnesses semantic searches, which understand the meaning of queries. Unlike the free Google search engine, which merely matches the words in a query against Web pages containing those keywords, Elsevier's illumin8 uses a thesaurus with a half-million pre-defined technology terms to associate semantics—the meaning of the phrases—with queries.
Text: http://www.eetimes.com/showArticle.jhtml?articleID=211800061
Audio: http://i.cmpnet.com/eetimes/audio/slideshow/56/5.mp3