Category Search. This interface is accessed through ‘Advanced Search’ under ‘Top View’ (a). (b) A category search is initiated by clicking the ‘Category Search’ tab. (c) In each category, only one item (term) can be selected. (d) The number of hits from a selected item (term) is then counted, and (f) displayed by clicking the ‘Submit’ button (e). (h) The results are then linked to ‘Information Overview’ by clicking ‘IO’. (g) The ‘Gene Symbol’ interface is linked to NCBI Entrez Gene. (i) The list of search results is obtained by clicking the ‘Download’ button.