ΣΠΣ (Sigma Pi Sigma)
Sigma Pi Sigma is the Physics academic honor society. Induction is typically done through the Physics Club, and the society welcomes non-majors who just have a general interest in Physics and have taken Physics courses. See the following links for more information if you are interested in being inducted.
Inductions are normally held once per year. While Physics Club membership is not a requirement for induction, membership in the club can help build connections to the society.