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Photography
Photography was invented in the 1820,s and methods for reproducing photographs in the print media were improved throughout the century. -
The telegraph
It was invented in the 1830,s and in practical use by the 1840,s and it was perhaps the most single important invention in the of mass communication. -
The phonograph
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An explosive growth online
There was an explosive growth online for people who use computers as well as public access to the internet.