Libraries are among the oldest private academic research libraries in California. For more than a century USC has been building collections in support of the university's teaching and research interests. Especially noteworthy collections include American literature, Cinema-Television including the Warner Bros. studio archives, European philosophy, gerontology, German exile literature, international relations, Korean studies, studies of Latin America, natural history, Southern California history, and the University Archives. The USC Warner Bros. Archives is the largest single studio collection in the world. Donated in 1977 to the University of Southern California's School of Cinematic Arts by Warner Communications, the WBA houses departmental records that detail Warner Bros. activities from the studio's first major feature, My Four Years in Germany (1918), to its sale to Seven Arts in 1968. Announced in June 2006, the testimony of 52,000 survivors, rescuers, and others involved in The Holocaust is housed in the USC College of Letters, Arts & Sciences as a part of the USC Shoah Foundation Institute for Visual History and Education. In addition to the Shoah Foundation, the USC Libraries digital collection highlights include photographs from the California Historical Society, Korean American Archives Automobile Club of Southern California, and the Chinese Historical Society of Southern California. The USC Digital Library provides a wealth of primary and original source material in a variety of formats. In October 2010, the collections at ONE National Gay & Lesbian Archives, the largest repository for documents from the lesbian, gay, bisexual and transgender (LGBT) community in the world, became a part of the USC Libraries system. The collections at ONE include over two million archival items documenting LGBT history including periodicals; books; film, video and audio recordings; photographs; artworks; ephemera, such clothing, costumes, and buttons; organizational records; and personal paper. USC's 22 libraries and other archives hold nearly 4 million printed volumes, 6 million items in microform, and 3 million photographs and subscribe to more than 30,000 current serial titles, nearly of manuscripts and archives, and subscribe to over 120 electronic databases and more than 14,000 journals in print and electronic formats. Annually, reference transactions number close to 50,000 and approximately 1,100 instructional presentations are made to 16,000 participants. The University of Southern California Library system is among the top 35 largest university library systems in the United States. The Leavey Library is the undergraduate library and is open 24 hours a day. The newly open basement has many