There are thousands of newsgroups available. These cover a wide variety of interests, from movie fan clubs to discussions about university classes, and can be moderated or unmoderated. The UM Online Directory is a large, searchable database of all University of Michigan students, faculty and staff. Currently, the Directory contains about 223,000 entries, including mailgroups. Non-authenticated users can search for and read all entries in the Directory.
Authentication allows users to edit personal entries and create or modify email groups.