The popular use of the typewriter in the office setting resulted in documents that are more uniform in appearance. Typewritten documents are the easiest to use in research.

Theodore Roosevelt, like many business men of his day, would have dictated his letters to a secretary who then prepared the final typed copies. Roosevelt typically annotated these with corrections and additions which give his letters a more personal quality. In this letter to Secretary of War Henry L. Stimson, Roosevelt refers to contemporary speculation on his presidential candidacy. Stimson's personal papers document his public service under five presidents from William Howard Taft to Franklin Delano Roosevelt.