1911: Women in the College of Fine Arts were allowed to hold membership in Greek letter societies and sororities. Alpha Kappa Psi, College of Fine Arts sorority, is founded.
1912: Gamma Kappa Club becomes a chapter of the national fraternity Theta Xi, becoming the first Carnegie Tech national fraternity.
1913: Opheleum Club is organized.
1914: Local fraternity Delta Epsilon Omega is organized.
1915: National fraternity Alpha Phi Delta installed.
1915: Local fraternity Tau Gamma Phi is founded.
1916: Local fraternity Iota Sigma Delta founded.
1916: Beta Theta Epsilon becomes a chapter of the national fraternity Sigma Nu.
1917: Sigma Tau becomes a chapter of the national fraternity Delta Upsilon.
1918: Interfraternity Council established to serve as the liaison with administration and to formulate and enforce regulations relating to rush, pledging, initiation, and recognition of new activities.
1918: Dean Mary B. Breed of Margaret Morrison made the decision that women in Margaret Morrison Women’s School could not hold membership in a sorority. Theta Sigma is shut down.
1919: Local chapter Alpha Pi is organized.
1919: Zeta Lambda Epsilon becomes a chapter of the national fraternity Sigma Alpha Epsilon.
1920: Sigma Rho becomes a chapter of the national fraternity Beta Theta Pi.
