The Society of Physics Students (SPS) is a professional association

Professional body

A professional association is usually a nonprofit organization seeking to further a particular profession, the interests of individuals engaged in that profession, and the public interest.The roles of these professional associations have been variously defined: "A group of people in a...

 with international participation, granting membership through college chapters with the only requirement that the student member be interested in physics. All college majors are welcome to join SPS, but the highest representation tends to come from majors in the natural sciences, engineering, and medicine. Within the SPS is Sigma Pi Sigma

Sigma Pi Sigma

Sigma Pi Sigma is the National Physics Honor Society. It strives to promote physics at all stages, to promote fraternity between those who excel at physics, and to promote service among its members. It is closely associated with the Society of Physics Students .- External links :*...

, a nationally recognized scholastic honor society

Honor society

In the United States, an honor society is a rank organization that recognizes excellence among peers. Numerous societies recognize various fields and circumstances. The Order of the Arrow, for example, is the national honor society of the Boy Scouts of America...

.