Abstract: Records of the National Broadcasting Company (NBC), the nation's oldest broadcasting network, founded in 1926 as a radio programming service which went on to both radio and television broadcasting. Although incomplete at the highest levels, the collection offers representative coverage of operations in advertising, public relations, research, sales, and news and public affairs broadcasting from the 1930s through the 1950s. Included are correspondence, memoranda, reports, logs, scripts, promotional material and publications, scenic designs, photographs, a few production files, and a library of scripts and recordings; legal and financial records are scarce.