The Walt Whitman Archive is an electronic research and teaching tool that sets out to make Whitman's vast work, for the first time, easily and conveniently accessible to scholars, students, and general readers. Whitman, America's most influential poet and one of the four or five most innovative and significant writers in United States history, is the most challenging of all American authors in terms of the textual difficulties his work presents. It is now published by the Center for Digital Research in the Humanities at the University of Nebraska-Lincoln.