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Look at the graph, and then answer the question. Which of the following statements explains why wireless device use exceeded 100 percent in 2011? Some people have more than one wireless device.
Would a generation of Americans have struggled to tap out messages on this intricate machine, dreaming in vain of a simpler way?
To a substantial extent, the history of innovations in telephony is an American story, in part because as late as the 1950s the U.S. had more than half of the world’s telephones, and in part because AT&T, operator of the Bell System and its research arm, Bell Telephone Laboratories, played a dominant role in telephone innovation.
20 Σεπ 2024 · Initially, subscribers had a button on their telephone to produce the required number of pulses by tapping. Then an associate of Strowgers' invented the rotary dial in 1896, replacing the button. In 1943, Philadelphia was the last major area to give up dual service (rotary and button).
The telephone played a major communications role in American history from the 1876 publication of its first patent by Alexander Graham Bell onward. In the 20th century the American Telephone and Telegraph Company (AT&T) dominated the telecommunication market as the at times largest company in the world, until it was broken up and replaced by a ...
