Think of it as a highly specialized search engine.

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That long tail includes about a hundred databases of specialized information that the search engine is now working on indexing, such as the Security and Exchange Commission's online filings and the online collection of medical journals known as PubMed.

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Meltwater had argued that it provides a specialized news-related Internet search engine that allows its 4, 000 U.S. customers to search for and receive information about news items relevant to their businesses.

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