国家广播公司(NBC)
全名National Broadcasting Co.
美国主要的商业广播公司，1926年由美国无线电公司、奇异公司、西屋电气公司共同组成，是美国第一个为建立广播网而组成的公司。在美国无线电公司总裁萨尔诺夫的领导下，1930年整个公司为美国无线电公司所拥有。国家广播公司初期分为两个半独立广播网，蓝色广播网以WJZ电台为主，红色广播网以WEAF电台为主，两个广播网各与其他城市的无线电台连接。到1938年，红色广播网播出国家广播公司75%的商业性节目。蓝色广播网在1941年被卖掉後成为美国广播公司（ABC）。国家广播公司继续以其受欢迎的喜剧、综艺和戏剧节目领导广播网的发展，但在1940年代晚期一场挖角战中，国家广播公司数个主要艺人跳槽至哥伦比亚广播公司（CBS）。使国家广播公司在缺乏优势的情况下进入电视时代，至1952年止，虽然渐渐重回其领导地位，但在电视收视率之战中一直都输给哥伦比亚广播公司。1986年奇异公司购并美国无线电公司。1987年国家广播公司出售所属无线电广播网。
English version：
NBC
Major U.S. commercial broadcasting company. It was formed in 1926 by RCA Corp., General Electric Co., and Westinghouse and was the first U.S. company to operate a broadcast network. Directed by RCA's president David Sarnoff, it became wholly owned by RCA in 1930. NBC was initially divided into the semi-independent Blue Network, based on station WJZ, and the Red Network, based on WEAF, each with links to stations in other cities. By 1938 the Red Network carried 75% of NBC's programs. The Blue Network was sold in 1941 and became the American Broadcasting Co. (ABC). NBC continued to lead the networks with its popular comedy, variety, and drama programs, but in the late 1940s it lost several leading performers to CBS in a talent raid. NBC entered television broadcasting in a weakened position, and by 1952 it trailed CBS in audience ratings, though it gradually regained its leading position. In 1986 RCA was sold to GE; in 1987 NBC sold its radio networks.