the process by which information or options are sorted to aid finding items and understanding their relationships to other items.
Categorization is the process in which ideas and objects are recognized, differentiated and understood. Categorization implies that objects are grouped into categories, usually for some specific purpose. Ideally, a category illuminates a relationship between the subjects and objects of knowledge.
Questions with the categorization tag regards the creation and maintainance of or the user experience of categorization.