11. A user-interface system for incrementally providing fully qualified links to a set of relevant search engines, the system comprising: computer memory comprising instructions in computer readable form that when executed cause a computer system to: identify a set of search engines and associate each search engine of the set with at least one descriptive category to which the subject matter of the corresponding search engine relates; provide access to a database containing a collection of potential full queries, each potential full query associated in said database with at least one descriptive category; receive a partial search query entered on a keypad by a user; infer, after each keypress received from the user, a set of potential full queries intended by the user, based at least in part on the partial search query; select a subset of the identified search engines that are relevant to the inferred full queries based on comparing the inferred full queries with the descriptive categories associated with the search engines, wherein the selecting the subset of relevant search engines is further based on the descriptive categories associated with the provided potential full queries; and provide, for each of the selected search engines, a fully qualified link designed to directly launch a search for a relevant query string using the search engine.
14. The system of claim 11 , the computer memory further comprising instructions that cause the computer system to estimate the degree to which each of the inferred potential full queries is relevant to the partial search query entered by the user.