All 3 groups are nationally recognized and have headquarters webpages. When you go through Formal Rush, you will be required to visit all sororities on your campus. Please keep an open mind when doing so - you may only like certain groups now based on reputation or what you see in public. Rush may give you a different perspective on the chapter and chapters to vary from campus to campus. A cool chapter of a sorority may be not-so-cool on another campus.
TAke some time and visit
http://www.greeklife.org/npc - learn about all 26 national sororities.
------------------
If you have to go around telling everyone you're in charge you're not
much of a leader.