Other
Code amber.org: Amber Alert System
This site explores what the AMBER Plan is, what the Amber Alert is, how Code Amber works, and more.
University of Houston
University of Houston: Engines of Our Ingenuity: No. 1393: Inventing the Telegraph
Read about the history of the telegraph in this article, which is a transcript of a radio broadcast.
South Carolina Educational Television
Kids Work!: History of Telecommunications
An in-depth look at inventions and developments that had an impact on telecommunication.