48. The client module of claim 46 , wherein the selector further includes an updating module configured for accumulating scores over multiple searches for each selected personalized search engine as a function of the quality of the search results for subsequent queries based on the characteristic information.
48. The client module of claim 46 , wherein the selector further includes an updating module configured for accumulating scores over multiple searches for each selected personalized search engine as a function of the quality of the search results for subsequent queries based on the characteristic information. 51. The client module of claim 48 , wherein the updating module is further configured for obtaining an intermediate score based on the weighted sum of frequencies of occurrences.