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Alexander Graham Bell invents the telephone
"Alexander Graham Bell Invents the Telephone." Http://www.telcomhistory.org/timeline.shtml. N.p., n.d. Web. -
Telephone transmission extends across and between major cities
Telephone Timeline - Greatest Engineering Achievements of the Twentieth Century." Telephone Timeline - Greatest Engineering Achievements of the Twentieth Century. N.p., n.d. Web. 07 Apr. 2015. -
The Rotary
Zigterman, Ben. "How We Stopped Communicating like Animals: 15 Ways Phones Have Evolved." BGR. Taboola, n.d. Web. 23 Apr. 2015. -
The Push-Button
Zigterman, Ben. "How We Stopped Communicating like Animals: 15 Ways Phones Have Evolved." BGR. Taboola, n.d. Web. 23 Apr. 2015. -
The Portable Phone
Zigterman, Ben. "How We Stopped Communicating like Animals: 15 Ways Phones Have Evolved." BGR. Taboola, n.d. Web. 23 Apr. 2015.