AS INFORMATION ACCESS BECOMES INCREASINGLY VIRTUAL, LIBRARIANS AND information managers are creating new gateways to knowledge. One of these gateways is taxonomy, a technique that organizes information into hierarchical categories. In my practice as an information management consultant, I have built taxonomies that are used for filing systems, libraries, intranets, and Snoopy dolls. This experience gives me insights into the art of category creation that may be useful to anyone ...