4. The method of claim 1 , further comprising: determining whether a hierarchy of categories includes additional subcategories of the selected category.
1. A machine implemented method comprising: receiving a first user input comprising a search query; displaying, by a data processing system, in a search interface accessible across a plurality of computer application programs, a plurality of results from a search performed across files and programs accessible by the data processing system, wherein the plurality of results matches the search query and are categorized into a plurality of categories, only a first subset of the plurality of results are displayed for each of the plurality of categories, and the results in the first subset are displayed grouped together in proximity to a displayed representation of a corresponding category; receiving a second user input comprising a selection of one of the displayed representations of the plurality of categories; and in response to the second user input, displaying, in the search interface, a second subset of the plurality of results, wherein the second subset matches the search query and is categorized into a plurality of subcategories of the selected category, and the results categorized into each subcategory is displayed grouped together in proximity to a displayed representation of a corresponding subcategory.