Sigma Pi (ΣΠ) is a collegiate fraternity with 232 chapters at American universities. As of 2021, the fraternity had more than 5,000 undergraduate members...

Phi Sigma Pi National Honor Fraternity (ΦΣΠ) is a gender-inclusive/mixed-sex national honor fraternity based in the United States. The fraternity is a...

Delta Sigma Pi (ΔΣΠ) (officially the International Fraternity of Delta Sigma Pi, Inc.) is a coeducational professional business fraternity and one of...

Sigma Pi Sigma (ΣΠΣ), founded at Davidson College on December 11, 1921, is the oldest and only American honor society for physics and astronomy. It is...

Sigma Sigma Sigma (ΣΣΣ), also known as Tri Sigma, is a national American women's sorority. Sigma Sigma Sigma is a member of the National Panhellenic Conference...

Sigma Pi Phi (ΣΠΦ), also known as The Boulé, is an African American professional fraternity. Founded in Philadelphia, Pennsylvania, in 1904, it is arguably...

Sigma (/ˈsɪɡmə/ SIG-mə; uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In...

Kappa Sigma (ΚΣ), commonly known as Kappa Sig or KSig, is an American collegiate social fraternity founded at the University of Virginia in 1869. Kappa...

Two Sigma Investments, LP is a New York City-based hedge fund that uses a variety of technological methods, including artificial intelligence, machine...

"Sigma Chi Welcomes 350,000th Initiate – Sigma Chi". "What is Sigma Chi?". Sigmachi.org. Retrieved 2014-02-26. The Founding of Sigma Chi Beta Theta Pi...