Series contains foundational documents of the association, correspondence, forms, constitution and by-laws, the society's seal, a franchise tax report and a certificate of incorporation.

Series consists of correspondence conducted by the American Osler Society, specifically correspondence of officers and correspondence communicated to the membership.

Subseries contains documents pertaining to the selection of the honorary and emeritus members. Contains one file of correspondence between officers on the subject and eight candidates’ files. Includes membership proposal files arranged in alphabetical order. Contains membership proposal forms, correspondence, curriculum vitae, bibliographies, reprints and a list.

Series consists of membership applications for various categories of members and memberships lists.

Subseries contains correspondence generated by the officers of the American Osler Association.
Contains one file of notes and photocopies complied by Earl Nation re. Geoffrey Jefferson (formerly Acc. 549), and correspondence with I.N. Dubin, M.D. (formerly Acc. 591)
Contains two files of correspondence related to the AOS during Larry Longo’s appointments of Member, Executive Council 1981-1985, 1987- present, Secretary Treasurer 1988-2000, Second Vice President 2001, First Vice President 2001-2002, President 2002-2003.
Contains two files of correspondence from Charles Roland, one file relates to correspondence for 2000/2001 and one file relates to correspondence relating to the beginnings of the AOS, and one file of materials compiled by Charles S. Ryan.

Subseries contains membership proposal files of successful and unsuccessful candidates, showing the recruitment of the association. Includes membership proposal forms, correspondence, curriculum vitae, bibliographies, an obituary notice, reprints and photographs

Consists of successful membership proposal applications from the 1970s.

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