National Fraternity Collections
- National Panhellenic Conference
- Founded in 1902, the NPC is the oldest interfraternity organization. Twenty-six national sororities comprise its membership.
- Fraternity Communications Association
- Organized in 1923, FCA currently represents over 300 members from Greek-letter society editors and their staffs, including NIC, NPC, National Pan-Hellenic Council, and Professional Fraternity Association member groups.
- North American Inter-Fraternity Conference
- Organized in 1923, FCA currently represents over 300 members from Greek-letter society editors and their staffs.
- Alpha Lambda Delta Archives (1924-2004)
- Founded as an honorary for freshman women at the University of Illinois in 1924, Alpha Lambda Delta is a national society that honors academic excellence during a student's first year in college.
- Alpha Tau Omega Archives (1865-Present)
- The first greek letter fraternity founded after the Civil War in 1865, Alpha Tau Omega has more than 240 chapters with over 181,000 members and more than 6,500 undergraduate members.
- Beta Alpha Psi Archives (1927-1993)
- Founded in 1919, Beta Alpha Psi is a scholastic and professional fraternity for financial information professionals. There are nearly 230 chapters on college and university campuses with more then 200,000 initiated members.
- Phi Eta Sigma Archives (1927-1980)
- Phi Eta Sigma was founded at the University of Illinois on March 22, 1923, as a freshman honor society for first-year male students. Its founders were three UI deans: Thomas Arkle Clark, Kendrick Babcock, and Charles Thompson.
- Phi Lambda Upsilon Archives (1906-2001)
- Phi Lambda Upsilon was founded at the University of Illinois as an honorary chemical society in March 1899. It has the distinction of being the first honor society dedicated to a single scientific discipline.
- Sigma Alpha Iota Archives (1903-2009)
- Organizedin 1903, SAI Internatioinal Music Fraternity promotes interaction among those who share a commitment to music.
- Beta Phi Mu Archives (1940-1995)
- Founded in 1948 by a group of leading librarians and library educators to recognize and encourage scholastic achievement in library science.
- Kappa Delta Pi Archives
- Founded by Dr. William Bagley in 1911 at the University of Illinois, was established to foster excellence in education and promote fellowship among those dedicated to teaching.
- National APIA Panhellenic Association Archives (2005-2008)
- Founded in 2005 to unite Asian Fraternities and Sororities onto common causes and facilitate communication between the various organizations.
- Pi Alpha Phi Archives (1929-)
- Founded in 1929 at the University of California, Berkeley, it is the oldest active Asian-American Interest Fraternity.
- Delta Phi Lambda Archives (1998-)
- An Asian-interest sorority founded by Anh Ngoc Nguyen and six other women at the University of Georgia in 1998.
