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Line 20: ==Clustering in search engines== A [[web search engine]] often returns thousands of pages in response to a broad query, making it difficult for users to browse or to identify relevant information. Clustering methods can be used to automatically group the retrieved documents into a list of meaningful categories, as is achieved by ~~Enterprise Search engines such as [[Northern Light Group\|Northern Light]] and [[Vivisimo]], consumer search engines such as [http://www~~e.~~polymeta~~g.~~com/ PolyMeta] and [http://www.helioid.com Helioid], or free Desktop Search Tools such as [https://www.noggle.online Noggle], or~~ open source software such as [[Carrot2]]. Examples:

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