Fonds consists of documents, which illustrate the founding, and the activities of the American Osler Society. Included are the administrative and financial documents, minutes, reports, correspondence of the officers, correspondence with members, files regarding links with other organizations and a survey. The fonds also contains documents related to membership, the annual meeting, the William B. Bean Student Awardship, the John P. McGovern Award Lectureship and publications generated by the association. Fonds contains the following series:
P125/A Constitution and Structure
P125/B Administration
P125/C Correspondence
P125/D Finances
P125/E Membership
P125/F Annual Meeting
P125/G William B. Bean Student Research Award
P125/H John P. McGovern Lecture
P125/I Public Relations and Links with other Organizations
P125/J Publications
P125/K Special Projects
P125/L Archives

Series consists of four subseries: P125/A1 History (1972 and 1987), P125/A2 Charters and Certificate of Incorporation (1975-1977), P125/A3 Constitution and By-Laws (1970-1982), and P125/A4 Seal (1970). Includes a presentation, correspondence, forms, by-laws, statements, seal, a franchise tax report and a certificate of incorporation.

Subseries consists of two files of ad hoc committees set up to study particular matters. The first file [P125/B4.1] contains records of the Committee on Medical History among Young Physicians and the second one [P125/B4.2] gathers information generated by the Ad Hoc Committee on the Oslerian Book.

Subseries consists of reports submitted to the attention of the Board of Governors. Contains one file with two reports: one on the sale of the Aequanimitas tie and one on membership criteria.

Series consists of two subseries: P125/C1 Correspondence of the Officers and P125/C2 Correspondence with Members. Includes almost only correspondence.

Subseries contains correspondence sent by the Secretary-Treasurer to the members about the activities of the association. Includes circular letters, membership lists, membership proposals, minutes and reprints.

Subseries contains financial statements concerning the financial accounts of the association, audit reports, investment reports, and documents created by the AOS Financial Committee.