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Telephone
In 1900, fewer than 2 phones per 100 people. When making a call, an operator has to manually connect two phones. -
1925 phonographs
In 1925, some phonographs used electric motors and amplifiers. -
Television
In 1946, TV became a huge part of Americans lives. One year prior, there were only 10,000 TVs. -
Later Television
In 1976 half of the U.S. had color TV. -
Computer
In 1977 the apple computer became available and within 20 years, 2/5 households had computers. http://oldcomputers.net/appleii.html