The Library of Congress has an online catalog that allows access to the records of the largest publicly available audio collection in the world. SONIC contains approximately 350,000 entries, representing over 25 percent of the Library's sound recording holdings. SONIC offers information to the public for the first time about a number of collections. These include over 100,000 45 rpm discs, 82,000 78 rpm discs, 68,000 NBC records from the 1930s-60s, 1,500 WWII Marine Corps combat recordings, and 2,000 "Meet the Press" broadcasts, among others. Visitors may search the catalog by keyword, title, name, or subject. Also available are several special "search screens" for specific searches, such as radio broadcasts, music only, or spoken word only. Audio samples are not provided online; instead the site lists standard catalog information, such as title, publication status, medium, work(s), genre, and a brief phyical description. The site includes a guide to using the collections and two finding aids.