9. A machine-readable volatile or non-volatile medium storing one or more sequences of instructions, which when executed by one or more processors causes the one or more processors to perform: a search engine or proxy receiving one or more distinct taxonomies; storing said one or more distinct taxonomies in association with a plurality of users; wherein each taxonomy of said one or more distinct taxonomies specifies categories and relationships between the categories; receiving a search query that includes one or more keywords to search and information about a user of the plurality of users requesting the search query; wherein the information indicates that the user belongs to a group selected from a set consisting of (a) a resident of a home, (b) an employee of a corporation, and (c) a customer of a business; based at least in part on the information about the user requesting the search query, selecting a taxonomy of the one or more distinct taxonomies stored in association with the plurality of users; wherein selecting the taxonomy comprises selecting a first taxonomy for all first users for whom the information indicates that those first users are residents of a home, selecting a second taxonomy for all second users for whom the information indicates that those second users are employees of a corporation, and selecting a third taxonomy for all third users for whom the information indicates that those third users are customers of a business; wherein each of the first taxonomy, the second taxonomy, and the third taxonomy differs from each other of the first taxonomy, the second taxonomy, and the third taxonomy; generating a search engine results page, at least in part, by applying to a search engine result item a set of rules that are associated with the selected taxonomy; wherein generating the search engine results page includes: (a) identifying search results independent of the taxonomy; and (b) providing to a client the search engine results based on the taxonomy.
10. The machine-readable volatile or non-volatile medium of claim 9 , wherein applying the set of rules to the search engine result item identifies a set of categories in the selected taxonomy to display on the search engine results page in association with the search engine result item; and wherein generating the search engine results page comprises including a description of at least a portion of the selected taxonomy in the search engine results page.