Founding Fathers - 04/08/1989
Alpha - 05/14/1989
Beta - 11/21/1989
Gamma - 11/18/1990
Delta - 04/13/1991
Epsilon - 12/07/1991
Zeta - 04/26/1992
TBS Merger "Zeta and a Half"- 10/26/92
Eta - 11/21/1992
Theta - 04/24/1993
Iota - 04/08/1994
Kappa - 04/28/1995
Lambda - 03/30/1996
Mu - 11/23/1996
Nu - 04/19/1997
Xi - 04/18/1998
Omicron - 12/11/1998
Pi - 04/09/1999
Rho -11/27/1999
Sigma - 05/06/2000
Tau - 11/18/2000
Upsilon - 05/05/2001
Phi - 12/01/2001
Chi - 05/04/2002
Psi - 05/03/2003
Omega - 12/12/2003
Alpha Alpha - 04/24/2004
Alpha Beta - 12/04/2004
Alpha Gamma - 12/03/2005