Since 1950, Augustana has had a chapter of the Phi Beta Kappa honor society. The college also has non-"Greek" collegiate fraternal organizations, including Epsilon Tau Pi (ΕΤΠ)(Eagle Scouts), Alpha Phi Omega (APO) (service), Sigma Alpha Iota (SAI) (music), Phi Mu Alpha Sinfonia (PMA) (music), Epsilon Sigma Alpha (ESA) (Service), Alpha Psi Omega (ΑΨΩ) (theater), and others. The Omicron chapter of Phrateres, a non-exclusive, non-profit social-service club, was installed here in 1941. Between 1924 and 1967, 23 chapters of Phrateres were installed in universities across North America. (The chapter name "Omicron" was reused for the chapter installed at San José State University.)