This folder contains correspondence relating to Edison's membership and activities in social clubs and professional societies. Among the items for 1905 are documents pertaining to the American Institute of Electrical Engineers, the Essex County Country Club, the Magnetic Club of New York, the Old Time Telegraphers' and Historical Association, and various automobile clubs and philanthropic organizations.

Less than 10 percent of the documents have been selected. The items not selected include invitations that Edison declined and correspondence from organizations in which he did not involve himself. Some items bear perfunctory Edison marginalia commenting that he is "too busy" to participate.