<P> Radio broadcasting in the United States is a major mass medium . Unlike radio in most other countries , American radio has historically relied primarily on commercial advertising sponsorship on for - profit stations . The U.S. does not have a national broadcaster that aims its programs at the general public . Nonprofit broadcasting typically comes in three forms : radio evangelism , community radio , and government - subsidized public radio , all of which rely at least to some extent on listener donations . Shortwave broadcasting in the United States includes federal government programs , as well as a limited number of privately managed broadcasts , for overseas audiences . Radio broadcasting became popular in the 1920s , alongside the new film industry . The arrival of television in the 1950s forced radio into a niche role , as leading participants moved into the much larger field of television . In the 21st century , radio has been adjusting to the arrival of the Internet and Internet radio . </P>
<P> Radio broadcasting in the United States is a major mass medium . Unlike radio in most other countries , American radio has historically relied primarily on commercial advertising sponsorship on for - profit stations . The U.S. does not have a national broadcaster that aims its programs at the general public . Nonprofit broadcasting typically comes in three forms : radio evangelism , community radio , and government - subsidized public radio , all of which rely at least to some extent on listener donations . Shortwave broadcasting in the United States includes federal government programs , as well as a limited number of privately managed broadcasts , for overseas audiences . Radio broadcasting became popular in the 1920s , alongside the new film industry . The arrival of television in the 1950s forced radio into a niche role , as leading participants moved into the much larger field of television . In the 21st century , radio has been adjusting to the arrival of the Internet and Internet radio . </P>
when did radio become popular in the us
when did radio become popular in the us
in the 1920s
in the 1920s