Write about three inventions and/or associated 21st  century practices that have transformed U.S. culture.  Discuss the  overall impact of this invention or practice on the culture.  Be  specific.
Make sure to address the following information in your paper:

Name and describe the invention or practice in detail.
Discuss how aspects of the culture have transformed as a result of the invention or practice you have selected. 
Provide evidence of the overall impact of this practice.