LIBRARIES: Digital Collections (University of Wisconsin Madison LibrariesResources within the collections are free and publicly accessible online. They are loosely organized into collections that span a range of subjects including art, ecology, literature, history, music, natural resources, science, social sciences, the State of Wisconsin, and the University of Wisconsin. Digital resources include text-based materials such as books, journal series, and manuscript collections, photographic images, slides, maps, prints, posters, audio, and video.