Telephone Technology<br />Changes through Time<br />
1920’s<br />
1925<br />
1950<br />
1963<br />
1970’s<br />
1980’s<br />
2010<br />
2010<br />
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Telephone Technology

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contest for High School Day

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Telephone Technology

  1. 1. Telephone Technology<br />Changes through Time<br />
  2. 2. 1920’s<br />
  3. 3. 1925<br />
  4. 4. 1950<br />
  5. 5. 1963<br />
  6. 6. 1970’s<br />
  7. 7.
  8. 8. 1980’s<br />
  9. 9. 2010<br />
  10. 10. 2010<br />
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