Hey! I go to UCSC so I can clarify all of that. Gamma Phi and Kappa (woo!) are the only NPCs on campus. KZ and AY are locals. I've never heard of NBO, and I've gone to UCSC since fall 2005. Tri Chi and Phi Delta Xi are also multicultural locals on campus. This website
http://soar.ucsc.edu/organizations.htm has an updated list of orgs registered with the school.