Subject files comprised of correspondence, reports, minutes, memoranda, and printed material concerning various aspects of YMCA work abroad, especially financial issues, boys' work, and war work.

Includes minutes, account books, scrapbooks, ephemera, correspondence, newspaper clippings, brochures and pamphlets, journals, committee reports and other materials that document the early history of the YMCA in New York City.

Correspondence, minutes, reports, financial documents, pamphlets, constitutions, articles and other records of the YMCA movement in Bulgaria, mainly in Sofia.

Records of YMCA work in Japan consisting primarily of correspondence among YMCA secretaries working in Japan, as well as correspondence and reports to YMCA leaders in the United States on matters relating to programs, war time activities, finances, membership recruitment, and religious instruction.

Correspondence, minutes, reports, financial documents, pamphlets, building plans, journal and newspaper articles and other records of the YMCA movement in Portugal, especially Coimbra, Lisbon and Porto.

Correspondence, reports, statistics, newspaper and journal articles, pamphlets, building details, images and handbooks; primarily concerning the development of YMCAs in San Juan, Puerto Rico and the surrounding area, mainily focusing on building development in San Juan, Ponce, and Mayaguez.

Correspondence, minutes, reports, financial documents, pamphlets, journal and newspaper articles and other records concerning the YMCA movement in England. Early records include the development of United Kingdom YMCAs. English, Scottish, Welsh and Irish national council reports and yearbooks, reports and other records from local associations, as well as material related to the YMCA's role during World War I and II make up the bulk of this material.

Correspondence, reports, minutes, proposals, magazines, newspaper and journal articles, financial documents, manuals, pamphlets, yearbooks, program catalogs, building plans, histories and images among other records of the North American YMCA’s work with other organizations, including the YWCA, the White House and other government agencies, colleges, community funds, and social welfare, citizenship, peace work, war work, and group work organizations.

Posters, maps, blueprints and other architectural records, artwork, and other oversized paper items.

Records documenting the administration of the YMCA's work with the United States armed services from the era of the Civil War through the late 1980s, particularly during the period from the time of the first world war through the Korean war.

Historical data, correspondence, reports, memoranda, articles, newspapers, pamphlets, photographs, scrapbooks, and other records documenting the YMCA's work serving the armed forces community from the time of the Civil War through the present.

Lantern slides and lantern slide shows or lectures compiled by the YMCA, for educational or entertainment use, depicting YMCA activities, mainly in the areas of international (foreign) work and armed services work during World War I.

Stereographs depicting a YMCA group hiking on Mt. Rainier in Washington, YMCA activities in France during World War I, and various YMCA buildings.