The University’s former students have established discipline- and field-specific alumni groups, which operate independently or as part of the University’s Alumni Association. The groups can consist of students who have studied a particular discipline (e.g., economics or theology), students who studied in a particular period or alumni interested in a specific topic (e.g., women’s studies, conferment ceremonies or the Helsinki University Museum). The groups may be registered or unregistered communities. Members of the Alumni Association can join the groups when paying their membership fee.