### telecom:

Radio
* All radio is transmitted electrical energy.
* Many radios use a tiny spring on one end of the string to provide tension.
* Most radios have a power antenna output
  - waves
* Most radios use digital technology
* Some radios have a pin on the mic jack for the receive signal
  - separate power antenna output and a separate amplifier output
  - slightly different crystal frequency
  - switch that selects high or low transmitter power
  - only run on batteries
  - produce energy
* Waves a form of light with a frequency that is much lower than visual light.
* allow the object to communicate with other objects.
* allows people to hear a message and be influenced by the power of sound.
* also can provide people with important social services, such as health education
  - plays an important role in language vitality
* are bands
  - broadcasting
* are communication devices
  - systems
* are located in bedrooms
  - schools
  - shops
  - space shuttles
  - trunks
  - one of the primary methods of informing the public in remote areas
  - shiny objects, and many are very dark
  - sound waves
  - used for communication
  - very important means of communication
* billion dollar industry.
* broadcast medium.
* can reach people who are isolated by language, geography, conflict, illiteracy and poverty.
* comes into popular use in the United States.
* commercial radio program, which normally includes commercials.
* controlled model aircraft come in all shapes and sizes
  - planes can, and have, killed people
* draws power from computer.
* foreground and a background medium.
* have antennas
  - channels
  - features
* includes sections.
* is an active medium in an active society
  - amorphous medium, especially when given a minimum degree of freedom from money
  - entity unique to the music industry
  - illusory medium
  - important medium
  - inherently shared medium
  - intimate medium which can reach people on the street, in their cars, or in their homes
  - broadcast by waves that travel through the air
  - by far the most influential means of communication in Somalia, a highly oral society
  - heard by the majority of people while driving to and from work each day
  - journalism with a positive attitude
  - less important in the United States than in most other countries
  - much more efficient as a medium of communication
  - normally the quickest and easiest means of communication
* is one of the last communication media to go digital
  - least secure means of communicating
  - our nation's first electronic medium
  - simply a means of advertising products and making money
* is the 'bread and butter' of American communication
  - chief means of mass communication in Peru
  - commuter's medium
  - media of the millennium
  - medium with the widest coverage
* is the most popular form of mass communication, reaching thousands of people in the state
  - widely available news medium in the United States
  - one medium with a direct pipeline into the mind
  - theater of the mind
  - tool for evangelism
  - uncluttered medium
* is used only in an emergency
  - to promote dialogue among polarized groups
  - word of mouth
* living medium, with live sounds and real people speaking.
* means sending energy with waves.
* medium of the moment.
* medium that relies solely on sound
  - requires the talents of numerous team members in order to work
* method of sending out sounds for long distances by the use of electricity.
* never-ending evolution of technology.
* often function better when off the ground and on a box or stool.
* personal Web application server.
* play songs
  - wed songs
* portable, user-friendly medium.
* prime source for news and entertainment.
* telephony the ability to transmit words and voices without wires had yet to be developed.
* tightly focused medium.
* use a large amount of bandwidth which slows the speed of Internet access
* uses electromagnetic waves to transmit and receive intelligence.
* vehicle that brings theater to the mind.
* very well understood technology that has been around for a hundred years.
* waves themselves, use the same rules as musical notes.
* way to send information from one place to another.
+ Mass media
  * Mass media' are media like radio, television, internet or other things that reach many people. Television is most used. We can see and hear  news from around the world. Radio also brings music and news. Books supply older and more detailed material. The internet is also important. We can search for all the news and information. Libraries are also important. In libraries we can read books and listen to music.
+ Transmitter: Machines :: Radio
  * Radio transmitters on a tower.