Consists of files created by P.E.N. American Center as part of its regular business operations since its founding in 1922. Includes material on governance and policies, programs, awards, and financial aid granted to authors, and the center's involvement with International P.E.N. and other P.E.N. organizations worldwide. The collection is especially notable for its extensive author correspondence and occasional original manuscripts, as well as audio and video recordings of P.E.N. programs and events.

Established in 1904 as the Department of Geology, and later known as the Department of Geological and Geophysical Sciences, the Department of Geosciences has grown to become the center for the study of Earth, atmospheric, oceanographic, and environmental sciences at Princeton. The records document the department from its 19th-century origins to the recent past with departmental files, faculty files, faculty meeting minutes and visual materials.

The collection contains records of the Princeton University student-run theatre organization and includes correspondence, clippings, photographs, playbills, posters, scripts, designs, and promotional materials.

The Industrial Relations Section at Princeton University was established in 1922 to enhance and extend the knowledge of industrial relations. The Section serves the university community, industry, and the government and includes a research program, a special library, and aids in instruction at Princeton University. The Section's records document the research and administration of the Section and include financial papers and materials related to its conferences, publications, and research.

Melvin A. Hall's renaissance career as adventurer, aviator, soldier, agent, financial administrator and author spanned four and a half decades, and is well represented in this collection. The materials include: diaries; personal and business correspondence; official documents, reports and correspondence from his tenure with the American Financial Mission in Persia; copies of his published writings, including drafts of his books Journey to the End of an Era and Bird of Time; articles, reviews, speeches and military intelligence reports; copies of unpublished writings; subject files containing background and research notes; information on his medals, awards and commendations; diaries and correspondence from Hall's father, William Augustus Hall, Hall's wife Josephine Johnson Hall, a World War I field nurse; and photographs and scrapbooks.

The Princeton University Phi Beta Kappa Records consist of correspondence, reports, minutes, and other materials relating to the administration, membership, and finances of this organization.

The Office of the Dean of the College is charged with overseeing undergraduate admission, curriculum, and academic development. The records document the work of the Dean of the College and the office staff, as well as faculty, students, alumni, and trustees whose work and interests have fallen under the domain of the Office of the Dean of the College. This record group contains annual reports, meeting minutes, departmental records, and correspondence.

Consists primarily of newspaper clippings, study materials, and other printed matter of Find (Princeton Class of 1922) reflecting his interests in the Far East, Chinese languages and education, the Soviet Union, the United States government, and the Vietnam conflict.

Harold Boies Hoskins was a businessman, diplomat, and educator working in Middle Eastern affairs. This collection consists of correspondence, diaries, notes, photographs, publications, maps, and professional files that document Hoskins' personal and professional activities, as well as the Hoskins family.

Hans A. Widenmann (1897-1976) was a stockbroker and economist with expertise in national and international monetary affairs. His successful business career was largely spent at Loeb, Rhoades & Company, and he was also frequently called upon to speak about international finance subjects. Widenmann's papers document his career at Loeb, Rhoades & Company and include his correspondence and writings, topical files, and biographical files.