an adequate surplus after covering operating expenses, full or partial membership reimbursements are paid back to volunteers after the convention. Most Worldcons have a small surplus, which the rules of WSFS suggest be disbursed "for the benefit of WSFS as a whole;" typically at least half of any surplus is donated to future Worldcons, a tradition termed "pass-along funds". Because of their size, Worldcons have two layers of management between the chairperson and the staff. "Departments" operate a specific convention function, while "divisions" coordinate the work of several departments. Department heads (sometimes called "area heads") have one or more deputies plus a large staff, or they may have no staff at all. Most Worldcons have between five and twelve division heads who form the convention executive group. Badges and ribbons Attendees are issued a convention badge, displaying each attendee's name, membership number and (if desired) "fannish" nickname. The customary practice is for all attendees at the same convention (occasionally excepting Guests of Honor) to wear badges of the same design, but each Worldcon's badge design is unique to that convention. In order for convention staff and members to identify quickly the function of other staff at the convention, Worldcons use ribbons of differing colors which are attached to convention badges to signify different roles and responsibilities. Often there are ribbons to signify rank, division, and department or specialized functions; ribbons are also used to identify program participants, other noteworthy members (for example "Past Worldcon Guest of Honor", "Hugo Award Nominee", etc.), or classes of members ("Dealers", "Artists", "Party Hosts") who are interacting with convention staff. Some members of the committee may be performing a variety of current or past roles and could have a large number of ribbons attached to each other hanging from a badge. Extending this tradition, other groups and individuals create more special ribbons for use at the convention; these may be serious or silly. Convention badge ribbons are important memorabilia for some people, and become valuable years later because they evoke memories of events at the convention, and may be displayed in exhibits at future conventions. See also List of Worldcons by date List of Worldcons by city References External links Worldcon official website World Science Fiction Society official website Current WSFS rules, including Constitution Recurring events established in 1939 Science fiction conventions Science fiction organizations Festivals established in 1939 Speculative fiction сonventions