Alpha Phi Omega is a national, co-ed service fraternity
based on the ideas of leadership
According to APO's website, nearly 300,000 students have been initiated into the fraternity since being founded in 1925, and current membership exceeds 17,000 students at approximately 350 colleges and universities.
Famous APO alumni include President Bill Clinton, and James A. Lovell Jr. who was an astronaut.
Alpha Phi Omega website: http://www.apo.org