Along with images from the Thomas Edison National Historical Park archives, which were scanned from Parts I-III of the microfilm edition, the digital edition contains numerous additional images from other repositories and private collections. Included are items from the AT&T Archives, Charles Edison Fund, Edison-Ford Winter Estates, Henry Ford Museum and Greenfield Village Research Center, Historical Society of Pennsylvania, Library of Congress, National Archives, New-York Historical Society, New York Public Library, Smithsonian Institution, Wichita State University, and Yale University.
Outside Repositories and Private Collections is updated on a regular basis. Among the recent additions are approximately 1,000 images of correspondence and other documents from the Library of Congress and the private collection of Charles Hummel relating to Edison's research during World War I and his role on the Naval Consulting Board. Also recently added are approximately 1,100 letters from the Charles Edison Fund written by Edison's six children and their spouses.