d to the rapid growth of radio over the next two years, resulting in over 500 licensed stations by the end of 1922. Around the 1970s microcircuits replaced printed circuits. Plastics were put to use in the casing of the components, instead of a heavy wooden covering. Amplifiers of the radio currents enabled modern style speakers to be used to translate electrical impulses and currents into sound. The development of radio throughout the 20th century has led to many new and wonderful uses and products. These include: television, radar, the Global Positioning System of satellites, remote-control, cellular mobile telephones, cordless telephones, and commercial and private satellite communications. The cost of radio devices has also changed American society. Modern radio receivers for purely audio broadcasts are pretty cheap, some types obtainable from dollar stores (for $1 obviously). Televisions, wireless and cellular phones, and other advanced radio systems are more expensive, yet not impossibly expensive for a working middle-class citizen. This availability to the majority of the population has increased use of radio devices, raising awareness of local, national, and global news. Unfortunately, this increased use also created a new part of society which is lazy and addicted to television in many cases. Radio is now a very widely used technology. Almost everyone uses it to communicate and to get news. Through both television and public radio news people are able to find out about things going on all over the world. Cellular phones, Citizen Band (CB) radios, two-way radios (Walkie-Talkies), satellite phones, and cordless phones all help people to communicate from places where phone lines are not necessary or cannot be laid. Commercial companies use it for advertisement. Most frequently, people use the radio or television for entertainment and relaxation. People watch engaging programs broadcast over radio waves and received by telev...
