“Letters” of each Greek house have symbolic meaning. New members or pledges cannot wear letters until initiated, for boys when pledging is over. They are the greek alphabetical letters of the full name of the greek sorority or fraternity. Boys pledge for one semester, girls do not “pledge” but rather initiated a few weeks after bid night. (Pledging is more of a fraternity aspect.) The significance of letters in the greek community represent the ideals, values, traditions, customs, and folklore of the house. Wearing these letters is also a physical symbol of pride. I think letters promote the exclusiveness of each house in that it distinguishes members from each other.