UNDERGRADUATE CHAPTERS- denoted by a Greek letter, composed only of Fraters who are undergraduates at the resident college (denoted by letters "UG").
ALUMNI CHAPTERS- usually denoted by the name of the locality or undergraduate chapter of origin, composed only of graduate Fraters. These men and women come into the Chapter by graduating out of an undergraduate Chapter or by direct induction as members of AZO (denoted by letter "A").
MIXED CHAPTERS- composed of both graduate and undergraduate members. Some chapters may hold seperate alumni and undergraduate meetings, but when the entire Chapter is in regular session it is composed of both (denoted by letter "M").