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A variety of radio antennas on Sandia Peak near Albuquerque, New Mexico, United States

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3  hertz (Hz) and 300  gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications.

In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile navigation instrument receives radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device. ( Full article...)

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Dee in 1951

Mary Dudley (born Mary Elizabeth Goode; April 8, 1912 – March 17, 1964), known as Mary Dee, was an American disc jockey who is widely considered the first African-American woman disc jockey in the United States. She grew up in Homestead, Pennsylvania, and then studied at Howard University for two years. After having her family, she attended Si Mann School of Radio in Pittsburgh, and on August 1, 1948, went on the air at WHOD radio. Gaining national attention, Dee broadcast from a storefront, "Studio Dee", in the Hill District of Pittsburgh from 1951 to 1956. She moved her show, Movin' Around with Mary Dee, to Baltimore and broadcast from station WSID from 1956 to 1958. In 1958, she moved to Philadelphia and hosted Songs of Faith on WHAT until her death in 1964.

Dee is considered a pioneer in developing the radio format that combines coverage of community affairs with music and news. She was one of the first two black women admitted to the Association of American Women in Radio and Television, and was successful in campaigning for the organization to forgo meetings in segregated facilities. During her lifetime she received numerous awards for her civic work. In 2011 she was honored posthumously with the Thomas J. MacWilliams Lifetime Achievement Award from the Media Association of Pittsburgh. ( Full article...)
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Radio topics

Formats Community radio, Music radio, Old-time radio, Radio comedy, Radio documentary, Radio drama, Sports radio, Talk Radio, Top 40
Networks BBC Radio, Blue Network, Columbia Broadcasting System, Mutual Broadcasting System, National Broadcasting Company, Sirius Satellite Radio, XM Satellite Radio
People Fred Allen, Gracie Allen, Don Ameche, Jack Benny, Edgar Bergen, Jagadish Chandra Bose, George Burns, Charlamagne tha God, Ronald Colman, Jim Connors, Frank Conrad, Norman Corwin, Charles Coughlin, Frankie Crocker, Ebro Darden, Alice Faye, Stan Freberg, Sean Hannity, Vaughn Harper, Phil Harris, Bob Hope, Hal Jackson, Spike Jones, Tom Joyner, Hans von Kaltenborn, Larry Elder, Larry King, Kay Kyser, Frances Langford, Rush Limbaugh, Guglielmo Marconi, Angie Martinez, Elizabeth McLeod, J. Carrol Naish, Ozzie Nelson, Arch Oboler, Dorothy Parker, Virginia Payne, Harold Peary, David Sarnoff, Red Skelton, Kate Smith, Stephen A. Smith, Howard Stern, Nikola Tesla, Jonathan Toubin, Lurene Tuttle, Rudy Vallée, Fred Waring, Orson Welles, Wendy Williams, Angela Yee
Shows Abbott and Costello, Amos 'n' Andy, Arch Oboler's Plays, The Breakfast Club, Burns and Allen, Cavalcade of America, CBS Radio Mystery Theater, Dragnet, Duffy's Tavern, Ebro in the Morning, Fibber McGee and Molly, The Goldbergs, The Howard Stern Show, Inner Sanctum Mysteries, The Jack Benny Program, Life with Luigi, Lights Out, Lux Radio Theater, Opie and Anthony, The Archers, The Hitchhiker's Guide to the Galaxy, The Phil Harris-Alice Faye Show, Quiz Kids, The Screen Guild Theater, The Shadow, Suspense, Theater Guild on the Air, Twenty Questions, The Whistler, Yours Truly, Johnny Dollar, Tom Joyner Morning Show, Rush Limbaugh Show
Technology Amateur radio, AM broadcasting, FM broadcasting, International broadcasting, Internet Radio, Digital Radio Mondiale, HD Radio, Digital Audio Broadcasting, GNU Radio, Software-defined radio, Transistor radio, Vacuum tube, Pirate radio

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  • Radio December 12, 2006 " create, expand, and maintain Wikipedia articles related to radio, including radio propagation and reception, radio programming, radio personalities, and the business of radio." (Example: Mutual Broadcasting System)
  • Radio Stations February 15, 2005 " coordinate the activities of creating and maintaining articles about radio stations." (Example: Pulse FM Kingborough & Huon)
  • Podcasting January 21, 2007 " make Wikipedia's knowledge of notable Podcast and podcast-related information as complete as possible." (Example: Podcast)
  • Amateur Radio (Inactive), August 24, 2006 " improve Wikipedia's articles related to Amateur radio, maintain the amateur radio category and its sub-categories for clean organization, and to produce and maintain templates for Amateur radio-related topic identification." (Example: Amateur radio)

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