Collegiate secret societies in North America - Wikipedia, the free encyclopedia: "There are many collegiate secret societies in North America. They vary greatly in their levels of secrecy and independence from their universities. As the term is used in this article, a secret society is a collegiate society where significant effort is made to keep affairs, membership rolls, signs of recognition, initiation, or other aspects secret from the public.
Some collegiate secret societies are referred to as 'class societies', which restrict membership to one class year. Most class societies are restricted to the senior class, and are therefore also called senior societies on many campuses."
