Established in the late 1970s, the Carl A. Fields Center for Equality and Cultural Understanding (called the Third World Center until 2002) celebrates, acknowledges, and promotes diversity on the Princeton University campus. The collection documents the Carl A. Fields Center's programs and administration over a period of thirty years.

This collection contains ephemera pertaining to environmental and ecological issues in Ecuador. It consists of pamphlets, flyers, and serials published between 1987 and 2003, although the majority of documents were published after the mid 1990s. General subjects addressed by the ephemera include the petroleum industry, the role of foreign oil companies in Ecuador, sustainable development, environmental education, and conservation of land, resources, and species.

Barton Gellman is a well-known journalist and winner of the Pulitzer Prize. The records in this collection document Gellman's work as a journalist and political advisor.

This collection includes images and videos from Ballet Folklórico de Princeton performances from 2006‐2013.

The papers of the Astrophysical Sciences Department represent the original observation records, correspondence, and teaching documents of Princeton astrophysicists from 1835 to 1990.

The American Civil Liberties Union (ACLU) is the pre-eminent civil liberties organization in the United States, utilizing litigation, lobbying, and public education to defend and preserve the individual rights and liberties guaranteed by the U.S. Constitution. These records document the administration and work of the ACLU's national office, regional offices, and legal projects, with particular emphasis on the areas of civil rights, children and women's rights, freedom of speech (and all First Amendment questions), and due process, among many others. The records include case files, correspondence, meeting minutes, research files, and files of staff members. Portions of the records (Subgroup 1; Subgroup 2, Series 2, 3, and 4; Subgroup 3, Subseries 5B) have been digitized and are available for members of the Princeton community to view here. To view the database from outside Princeton University, please see the Guide to the American Civil Liberties Union Records.

The Admission Office has determined who should be allowed to enroll as undergraduates at Princeton University since 1922. The actual composition and the desired composition of each class have been contentious campus issues since the introduction of selective admission. The debates over the value of recruiting and admitting alumni sons, war veterans, athletes, disadvantaged students (especially racial minorities), and women are reflected in the records of the Admission Office. This collection includes a number of reports and minutes, some of which are restricted, news clippings and releases about Princeton admission, historical materials, and a series of Admission Office publications.

The Alumni Association of Princeton University organized the conference ¡Adelante Tigres! Celebrating Latino Alumni at Princeton University in the spring of 2017. The conference brought more than 750 alumni and guests to campus to reflect on and engage with not only the memories of Latino alumni but also the current experiences of Latino students at Princeton. The ¡Adelante Tigres! Collection consists of photographs and other records that Princeton alumni created and maintained during their time as Princeton students. Documented in the collection are a range of student activities, including cultural performances (dance and music), activism, reunions, and graduation. These materials were collected as part of the conference of the same name organized by the Alumni Association.

Abigail Klionsky is a member of the Princeton University undergraduate Class of 2014 who undertook an oral history project on Jewish student life at Princeton as part of her senior thesis. The collection consists of fifteen transcripts of Klionsky's interviews with Jewish alumni and also includes a copy of a transcript of Henry Morgenthau III's interview with David Frisch in 1979.

The Brandt & Brandt Contract Files consists primarily of contract files from Brandt & Brandt, the New York City literary agency, for published works where the rights have reverted to the author. Some represented authors are Margaret Banning, Bessie Brewer, Raymond Chandler, Carlos Fuentes, Arthur Machen, Mary McCarthy, Derek Patmore, Edna St. Vincent Millay, and Wallace Stegner. The Fuentes material (1967-1995) is extensive and covers a fuller range of literary agency activities.