The AHC is the University's repository of manuscript and special collections, rare books, and the university archives. Internationally known for its historical collections the AHC serves the students and other citizens of Wyoming as well as scholars from around the world. The AHC also sponsors a wide range of scholarly and popular programs including lectures, concerts, symposia, and exhibits. Access is free and open to all. Major areas of the manuscript collections include Wyoming and the American West, the mining and petroleum industries, U.S. politics and world affairs, conservation, journalism, transportation, and 20th century entertainment such as popular music, radio, television, and film.
The Toppan Library at the AHC is the university's rare book center. The collections consist of more than 40,000 items, documenting the history of the book from medieval illuminated manuscripts to the 21st century. Subject strengths of the holdings include the American West, British and American literature, early exploration of North America, religion, hunting and fishing, natural history, women authors, and the book arts