Each Category represents a custom logical grouping, and has a unique category index number. You can assign components, files, and histories to one or more categories. All categorizable components have a CategorySheet view, which shows you that component’s stored category memberships (CategoryMask).

Categories reside under the station’s CategoryService, which has views CategoryBrowser and CategoryManager. Categories play an integral role in station security, where you can give users permissions for some (or all) categories. For a general review, see Security model overview.