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		Category: Reference>
		Statistics & Facts
		InfoPlease
		Includes almanac, atlas, dictionary and encyclopedia.
		WolframAlpha Computational Knowledge Engine
		WolframAlpha is not a search engine. It generates output by doing computations from its own internal knowledge base, instead of searching the web and returning links. Their goal is to accept completely free-form input, and to serve as a knowledge engine that generates powerful results and presents them with maximum clarity.