I would like to see three levels of category.
Here's the situation.
Printer as a Category can have multiple sub-categories, (Paper Jam, Toner Replacement, Servicing Required, out of paper, etc)
Printer is a hardware, and I would like to place all Hardware under a Hardware category (one that is already established by default).
(Category)Hardware → (Subcategory)Printer → (Subcategory)Paper Jam, Toners Replacement, Servicing Required, etc
(Category)Hardware → (Subcategory)IP Phone →
(Subcategory)Unable to log in, unable to hear users, new call code required, etc