Part 1 of Essay
The evolution of broadcast programming can be identified into four stages. The first stage covers the debut of commercial radio in the 1920's. At that time the tone was considered proper, and formal. For several years radio broadcasting emphasized classical or semi-classical music, and historical drama. Commercials were ....

Part 2 of Essay
.... Age of Television, variety shows were the most popular program format. Another television staple of this era was the western. In the late 1950's action-adventure became popular. Since the 1960's there has been a increase in violence in the media (television). In 1968 censorship laws were relaxed in favor of a rating system that allowed any type of subject matter to be filmed. This permitted Hollywood to specialize in films featuring excessive violence. Many individuals and citizen groups have expressed conc ....