The Correspondence series is composed of correspondence between Brown and scholars, government agencies, and organizations. The correspondence typically discusses legislation, especially bills related to Social Security and health insurance, and also includes discussions with colleagues regarding recently published papers, higher education, and Princeton University. The series also includes correspondence between Brown and several family members regarding his travels and family news.

The Organizations series contains correspondence, meeting minutes, and reports related to government agencies, universities, and other organizations that Brown was a member of, typically as a member of the advisory committee, during his career. The organizations include Princeton University, McGraw-Hill Publishing, the New Jersey Social Security Commission, the Office of Production Management, the University of Rochester Board of Trustees, and the War Department. The series also includes Brown's course files for classes taught at Princeton University.

The Social Security series is composed of papers related to Brown's work as an architect of the original Social Security legislation in 1935, his participation on subsequent advisory committees on Social Security, and topical materials related to changes in Social Security. The papers include meeting minutes, drafts of reports, correspondence, and publications.

The Writings series includes copies of articles and speeches written by Brown, as well as drafts, clippings, and related correspondence. For speeches, some also include cards with notes for delivering the address. Brown wrote articles for scholarly magazines and for newspapers, and spoke before Congress, at universities, and at a wide variety of organizations. The subjects of the writings include Social Security, higher education, and promoting Princeton University and the Industrial Relations Section.

Materials document J. Douglas Brown's work with the Social Science Research Council Committee on Economic Security.

Series 4, General, 1944-2012 reflects Becker's personal activities. Becker used his financial and analytical skills throughout his career. He created a small file of his position papers, included are documents for the Investment Bankers Association of America, John J. Gilhooley during his bid for New York City Comptroller in 1961, and the Critical Issues Council directed by Milton Eisenhower. Some of these position papers can be found elsewhere in the series, for example the paper on the position of comptroller is found in the portfolio assembled by Becker and within the John Gilhooley correspondence. Other writings in this series include the foreign press reviews from Becker's Army service in the mid-1950s, and a manuscript entitled "Selling Municipal Bonds."

Series 3: Articles and Speeches by Clarence B. Randall includes two volumes of Randall's speeches given between 1932 and 1955 and a report on the economic aspects of internation travel.

Series 4: Books By Clarence B. Randall includes published copies of Randall's books written between 1938 and 1967. It also includes a small amount of communication between Randall and John Foster Dulles regarding economic integration with Canada.

Series 1 exists of family and personal correspondence, including correspondence and related papers that Thompson seems to have designated for his "Curio" volumes of family correspondence and memorabilia (see Series 4).