This category is the index of the atlas's own Group entities, the finer subdivisions filed beneath a Subcategory once an industry classification grows dense enough to need its own further split, such as a transportation or capital goods subcategory sorted into its own named industry groups. A Group carries entries the same way a Subcategory does, one level further down the browse hierarchy; it exists purely as a structural device for organizing entries, not as a business subject in its own right.