Encyclopedia Britannica
World Book Student
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Telephone Timeline
Cell Phone Timeline
How Did the Invention of the Telephone Change Society?
The Telephone's Impact on America
History of the Telephone
Cell Phone Facts
History of the Communication Technology: Telephone
Who invented the cell phone
The Mobile Telephones of the Future
World's First 'Smartphone' Celebrates 20 Years
The shape-shifting future of the mobile phone
Who Invented the Cell Phone?
BrainPop: Telephone
The Evolution of Phones
BrainPop: Cell Phone