The earliest radio stations were radiotelegraphy systems and did not carry audio. For audio broadcasts to be possible, electronic detection and amplification devices had … 展开

Broadcasting by radio takes several forms. These include AM and FM stations. There are several subtypes, namely commercial broadcasting, non-commercial educational (NCE) public broadcasting and non-profit varieties as well as community radio, student-run 展开

Extensions of traditional radio-wave broadcasting for audio broadcasting in general include cable radio, local wire television networks, DTV radio, satellite radio, and 展开

• Broadcasting construction permit
• Call sign
• Disc jockey (DJ)
• History of broadcasting
• International broadcasting 展开

Broadcasters in one country have several reasons to reach out to an audience in other countries. Commercial broadcasters may simply see a business opportunity to sell advertising or subscriptions to a broader audience. This is more efficient than broadcasting to a … 展开

Radio program formats differ by country, regulation, and markets. For instance, the U.S. Federal Communications Commission designates … 展开

• Federal Communications Commission website Archived February 17, 2011, at the Wayback Machine – fcc.gov
• DXing.info Archived January 26, 2006, at the Wayback Machine – Information about radio stations worldwide 展开