Consists of individual files of former undergraduate students of Princeton University, compiled by the Bureau of Alumni Information. Material in each file varies greatly but most include the names of relatives, notable achievements at Princeton and post-graduation, news items, address updates, and obituaries.

This collection contains over 1,800 items including mugs, pipes, canes, banners, hatbands, pins, jewelry, and other material collected by many individuals that document reunions, sporting events, student traditions, and other aspects of University life.

The cordéis or Brazilian chapbooks included in this collection were published between 1970 and 1990. Many of the items are undated.

The McCaddon Collection of the Barnum and Bailey Circus consists of correspondence, photographs, scrapbooks, and other material collected by business manager Joseph T. McCaddon prior to the 1907 merger of the circus with Ringling Bros.

The collection consists of American consulting engineer and newspaper columnist, Howard W. Ambruster's works, correspondence, miscellaneous material, and printed matter.

German Semitic philologist, Rudolf-Ernst Brünnow (1858-1917) was a professor of Semitics at Princeton (post-1910) in Greek, Latin, German, French, Turkish, Assyrian, and English. The collection consists of notes, photographs, inscriptions, tables, and descriptions by Brünnow.

Ray Stannard Baker (1870-1946) was a journalist, editor, and author. He earned recognition for his articles on liberal reform, for his philosophical essays written under the pseudonym David Grayson, and for his authorized biography and other works on President Woodrow Wilson. Baker's papers contain materials collected for his biography of President Woodrow Wilson and related to the Paris Peace Conference (1919-1920), which he attended as Director of the American Press Bureau, and include correspondence, publications, photographs, and newspaper clippings.

The ACLU is the preeminent civil liberties organization in the United States. These records document the work of their national office in the areas of civil rights, children and women's rights, freedom of speech (and all First Amendment questions), and due process, among many others, predominantly from 1970 to 2000.

This collection contains ephemera concerning religious issues and events in Brazil, published between 1899 and 2002.

Ferdinand Eberstadt (1890-1969) was a prominent Wall Street investment banker who also served in several government posts throughout his career. During World War II, he organized the production and distribution of supplies to the United States military through his work with the Army-Navy Munitions Board and the War Production Board, and he was subsequently involved in plans for the reorganization of the armed services and in the development of post-war economic policies. The Eberstadt papers primarily document his extensive career in public service to the United States related to defense and the economy, as well as his career as an investment banker and his personal life, and include correspondence, reports, his writings, and his personal papers.