The social fraternity Alpha Tau Omega was founded in 1865 at the Virginia Military Institute, and the Oregon Gamma Phi chapter was founded in 1910 and was closed in 2000. The collection contains historical information, pledge song information, and issues of the chapter publication, The Bumper, 1954-1966.

Beta Phi Mu, the library and information studies honor society, was founded at the University of Illinois in August, 1948. The collection contains the University of Oregon chapter records consisting of bylaws, ritual information, correspondence, committee information and minutes, member and initiate information, treasurer's books and receipts, and a brass wick lamp, 1973.

Phi Mu Alpha Sinfonia was established for male musicians in 1898 as a secret society, and in 1900 became a collegiate fraternity. The collection contains the University of Oregon's Psi Chapter records including a fraternity scrapbook, correspondence, and records of honorary members.

Phi Chi Theta is a business and economics fraternity that was founded on June 16, 1924 in Chicago, Illinois; the now inactive University of Oregon chapter was formed in 1962. The collection includes correspondence, minutes, office files and artifacts, 1976-1978

Pi Mu Epsilon dedicates itself to the promotion of mathematics and recognition of students who successfully pursue mathematical understanding. The University of Oregon Chapter, Oregon Alpha, was established in 1931 but is now inactive. Collection includes correspondence, initiation material, and artifacts from this fraternity, 1925-1930's.

Sigma Xi was founded in 1886 (nationally) to honor excellence in scientific investigation and encourage a sense of companionship and cooperation among researchers in all fields of science and engineering. The Society of the Sigma Xi, University of Oregon Chapter, was founded in 1923 after a two year effort. Collection contains office files, correspondence, fraternity records, chapter book, and historical information.