Americans United for Separation of Church and State, founded in 1947, is a non-profit and non-partisan organization dedicated to church-state separation. The Americans United Subject files are approximately 44 linear feet of secondary research material relating to the religious right and religion in government and schools. Over 300 organizations are represented, with most of the material consisting of clippings, mass mailings, and newsletters.

The bulk of the Motley papers document her professional life. The papers include correspondence, manuscripts, memoranda, speeches, interviews, photographs, audio cassettes, and memorabilia.

Professional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round

The Graduate School of Journalism Records document the progression of the school from its founding in 1912 through the 1990s. The records consist of audio/visual material, clippings, copies of various publications, administrative correspondence, notes, photographs, and transcriptions of articles and speeches.

This collection contains the papers of lawyer and legal scholar Herbert Wechsler. The various documentation includes Wechsler's work with the United States Department of Justice (including documents from the Nuremberg and International Military Tribunals), The American Law Institute (including the work of the Model Penal Code), Columbia University, and several other organizations to which Wechsler contributed or with which he was affiliated. The collection also contains papers related to Wechsler's legal work, including documents pertaining to his work on New York Times Co. v. Sullivan. Wechsler's scholarly work is also collected here including drafts of articles, books, speeches, and special lectures such as his Oliver Wendell Holmes Lecture, "Toward Neutral Principles of Constitutional Law". The Herbert Wechsler papers also cover various points of interaction Wechsler had with other figures in his field including Francis Biddle, Telford Taylor, and Supreme Court Justice Felix Frankfurter. The genre of documentation is primarily correspondence, reports, and writings with annotations. The collection also contains some ephemera and photographic materials and one audiocassette.

The Lawrence A. Cremin Papers document the career and personal life of Lawrence Arthur Cremin, educational historian and seventh president of Teachers College, Columbia University (1974-1984). Cremin was an acclaimed historian of American education whose work framed the formal school as one of many institutions responsible for educating children. The collection includes records of his teaching and administrative work at Teachers College, manuscripts and published works by Cremin, and personal and professional correspondence.

New York City Opera (NYCO) was famously dubbed "The People's Opera" by Mayor Fiorello LaGuardia at its founding in 1943. The Opera company's mission is to inspire audiences with innovative and theatrically compelling opera at an affordable price. This collection documents the artistic productions and the daily administrative functions and operations attest to the mission of the company. The materials in this collection consist of administrative and financial records, production files, stage guides, scores, correspondence, programs, photographs, posters, scenery plans, memorabilia, printed materials, and audio and video recordings, dating from 1924 to 2019, with its bulk dating from 1965 to 1991.

This collection contains the papers of Peter G. Davis (1936-2021), who worked as a classical music critic at various national and specialist publications from 1962-2018. It includes the vast majority of Davis's writings on music (published or draft), along with print material relating to these writings, Davis's compositions (1957-1964), material relating to Davis's early education (1948-1959), and correspondence and interviews with a number of major classical musicians.

Peter Maas (1929-2001) was an author and journalist, best-known for his non-fiction books on organized crime, particularly The Valachi Papers and Serpico, which were later made into films. The collection includes business files, clippings, correspondence, drafts, interviews (both tapes and transcripts), manuscripts, and research files.

Peter Schickele (b. 1935) is an American composer, music educator, and satirist. He is best known for his comedy pieces composed by the fictional character P.D.Q. Bach. The collection contains manuscript and engraved scores and parts, sketches, revised and annotated copies of Schickele's work. In addition, the collection contains scripts of dramatic pieces or spoken introductions, correspondence, and memorabilia.