Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Information Forms (hierarchy name)
5. information forms (objects)
6. document genres
7. [documents by form]
8. lists (document genres)
9. [lists by form or function]
10. mailing lists

Anotations

Scope note:

Internet-based discussion forums in which messages are exchanged via electronic mail, rather than through a bulletin board system or newsgroup. LISTSERV (TM) is a trademarked term for a commercial software product devoted to managing electronic mailing lists. Though "listserv" is often generically used to refer to any such software application, and commonly to mailing lists themselves, "electronic mailing lists" is preferred.