Hadassah Functions and Operations Records represent the bulk of aid and services provided to Hadassah's membership, from the 1920s to 2011. Materials found in the record group include correspondence, clippings, press releases, manuals and kits for chapters and members to implement programming and chapter structure, fundraising campaigns, scripts, study guides, programming for local and national meetings, biographical files, and training documentation. Departments documented in the record group include Public Affairs, Education, Women's Health, American Affairs, Zionist and International Affairs, Speakers Bureau, Fundraising, Program, Organization, Outreach and Tourism Departments. Materials related to the general administration of Hadassah are also in the record group; these materials include research and development of projects, archives department correspondence and other materials, Hadassah House administration, and strategic planning. The record group also documents Hadassah's efforts to expand membership outside of the United States, by the development of Hadassah International.

The General Jewish Council was an umbrella organization founded by the American Jewish Committee, American Jewish Congress, B’nai B’rith, and Jewish Labor Committee in order to coordinate their rights defense activities.

The bulk of the records in this collection date between from 1938-1944, the active years of the Council. Materials consist primarily of correspondence, minutes, memoranda, and reports.

This collection contains the personal and professional papers of Abbo Ostrowsky, including correspondence with many important figures from the art world, several of whom had been students of Ostrowsky at the Educational Alliance Art School. There is also information about Ostrowsky’s career as an artist, including some original artwork, exhibition catalogues, and photographs. These materials show Ostrowsky’s significant influence on modern Jewish art and on the success of the Educational Alliance as an institution.

This collection contains documents relating to Isaac A. Hourwich’s role as an economist, publicist, statistician, lawyer, author, and authority on immigration, as well as his involvement with the labor movement and the formation of the American Jewish Congress. There are reports, minutes of meetings, memoranda, clippings and correspondence, and manuscripts and articles about Jewish labor, Socialism, Russia, Marxism, immigration, and other subjects. These materials demonstrate Hourwich’s important role in American labor, immigration theory, and political and economic theory.

This collection contains the personal and professional papers of William Edlin, editor of The Day and a prominent Socialist. It includes correspondence with individuals and with organizations, newspaper clippings, manuscripts of works by Edlin and by others as well as translations done by Edlin, and some of Edlin’s personal documents. These materials relate to Edlin’s involvement with The Day, with the Socialist Party, the Workmen’s Circle, various labor and Zionist organizations, literary clubs and activities, and with music, art and drama.

The records chronicle the ideology behind the Reconstructionist movement, the founding and activities of the Jewish Reconstructionist Foundation, and its growth and transformation from an ideology and movement into an established American Jewish denomination, Reconstructionist Judaism. The records also document two seminal figures in Reconstructionist Judaism, Mordecai Menahem Kaplan and Ira Eisenstein. Included in the collection are the administrative records of the Foundation (minutes, financial records, bylaws), publications produced by the Foundation including manuscript submissions for the influential publication The Reconstructionist, correspondence, sermons, prayer books produced by the Foundation, syllabi, sheet music, photographs, and speeches, among other material. In the correspondence are letters from Martin Buber, J. Edgar Hoover, and Albert Schweitzer.

Spanning from its inception and incorporation in 1925 to its culmination in 2002, the Queens Jewish Center collection highlights this congregation's wide-range of religiously oriented and secular educational activities, ceremonies, developments, events, and programs. Predominant in this collection are the reports, bulletins, financial, legal and property records, and meeting minutes. In addition, books, clippings, correspondence, pamphlets, programs, publications, negatives photographs are also contained with in this collections.

This collection contains records of the Zukunft monthly journal, which was devoted to publishing political, scientific and literary articles in Yiddish. It contains newspaper clippings, correspondence, meeting minutes, materials relating to conferences and anniversary issues, financial reports, programs, mailings, subscription materials, and typed and handwritten manuscripts submitted for publication.

This collection contains correspondence, pamphlets, periodicals, newspapers, press releases, writings, clippings, brochures, fliers, and posters from the era of the Spanish Civil War, and later, documenting American and international fund-raising for humanitarian relief of Republican Spain; American and international public opinion about the war; the participation of Jews in the International Brigades; and reminiscences and commemorations of the war and, particularly, of the International Brigades, in later years. A portion of the material on relief work pertains to trade union activities, as documented in papers of Charles S. Zimmerman, of the International Ladies’ Garment Workers’ Union, in his capacity as leader of Trade Union Relief for Spain, in New York City. Other organizations represented include the Medical Bureau and North American Committee to Aid Spanish Democracy; the Spanish Information Bureau in New York; the Friends of the Abraham Lincoln Brigade; and the Israeli branch of the association of volunteers in the International Brigades. There are also autobiographical manuscripts by Benjamin Lubelski and Sigmund Stein, who participated in the International Brigades; and contemporary publications in a variety of languages, including publications of the anarchist-leaning Spanish trade union confederations CNT-FAI.

Collection documents the activities and missions of the Union of Orthodox Jewish Congregations of America (UOJCA), primarily during the presidencies of William Weiss (1933-1942), Samuel Nirenstein (1942-1948), Moses Feuerstein (1954-1965), and Rabbi Pinchas Stolper’s tenure as Executive Vice President (1976-1994).

Founded in 1898, the UOJCA, also known as the Orthodox Union, serves as the leader, organizer, and voice of affiliated Orthodox Jewish congregations in North America. Divisions of the UOJCA reflected most prominently in the collection include the National Conference of Synagogue Youth, the Women’s Branch, the Kashruth Division, the Department of Synagogue Services, the Israel Center, as well as regional branches.

Subjects addressed in the collection include Sabbath and high holiday observance, dietary laws, Baal Teshuva, slaughterhouse legislation, funeral standards, education, and synagogue management and outreach. Materials include correspondence, minutes, clippings, speeches, UOJCA publications, financial documents, and a few photographs.