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spread of work radio communication network

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  • Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …   Wikipedia

  • Radio communications during the September 11 attacks — This article reviews some of the details of radio communications at the September 11, 2001 World Trade Center attacks. [The purpose of revealing the operational details in this article is to allow operators of other communications networks and… …   Wikipedia

  • radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …   Universalium

  • Spread spectrum — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Radio and terrorism — The radio have a widespread use as a tool of communication. Since its invention in the late 19th century, it has been used for various purposes around the world. This article discusses radio as a political tool of propaganda in the context of… …   Wikipedia

  • Network neutrality — This article is about the general principle of network neutrality. For its specific application to Canada, see Network neutrality in Canada. For its application to the U.S., see Network neutrality in the United States. Network Neutrality Related… …   Wikipedia

  • Computer network — Computer networks redirects here. For the periodical, see Computer Networks (journal). Datacom redirects here. For other uses, see Datacom (disambiguation). Internet map. The Internet is a global system of interconnected computer networks that… …   Wikipedia

  • Crystal radio — Crystal set redirects here. For the Australian rock band, see The Crystal Set. A modern reproduction of an antique crystal set. It is tuned to different stations by moving the sliding contact (right) up and down the tuning coil (red). The device… …   Wikipedia

  • Timeline of radio — The timeline of radio lists within the history of radio, the technology and events that produced instruments that use radio waves and activities that people undertook. Later, the history is dominated by programming and contents, which is closer… …   Wikipedia

  • Information and communication technologies for development — An OLPC class in Ulaanbaatar, Mongolia …   Wikipedia

  • Antenna (radio) — Whip antenna on car …   Wikipedia

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