Omega (O-mega) means big O. Omicron (O-micron) means little O. That is not how the were written, but how they were pronounced. Omega was OOO-mega, we would use it to pronounce OWN in English. Omicron was pronounced as we would use the O in COT.
Delta Omicron was created on 1909-09-06.
Delta Omicron's motto is 'Continually striving, we attain.'.
Delta Omicron Sigma was created in 2003.
Sigma Phi Omicron was born in 1964.
Omicron - 1963 is rated/received certificates of: Italy:VM14
Omicron Delta Kappa was created on 1914-12-03.
Alpha Iota Omicron was created on 1998-10-16.
Alpha Omicron Pi was created on 1897-01-02.
Omicron - 1976 VG was released on: USA: 1976
Omicron Epsilon Pi was created on 2000-02-07.
Mu Omicron Gamma was created on 2001-09-09.