This is understood to be the first time a Radio 4 programme has ever been licensed for commercial radio. (premierchristianity.com)
A few commercial radio programs are produced especially for class listening during school time and several of the larger school systems operate their own radio or broadcast over commercial facilities. (customwritingservices.org)
November 2, 1920: KDKA, the first commercial radio station in the United States, goes on the air in Pittsburgh. (discovermagazine.com)