Methods for classifying computer objects. The methods may comprise receiving a tag for a first computer object. The tag may comprise at least two nested categories describing the first computer object. The methods may also comprise updating a hierarchy of categories for computer objects to include the at least two nested categories describing the computer object. In addition, the methods may comprise displaying a graphical representation of the hierarchy of categories, and displaying an indication of computer objects having tags comprising a first category when an indication of the first category is received.