 Library cooperation in the United States has been around for more than a century, and a number of useful writings exist, documenting this type of cooperative activity and history.For example, since the 1930s, intentional, cooperative sharing of collections was pursued among the "Triangle" Universities in North Carolina (Duke University, North Carolina State University, and University of North Carolina, Chapel Hill).Shared cataloging through OCLC and RLG brought libraries together in the 1960s and 1970s, while the 1980s saw movement to fast delivery for books and articles.