- 
  
  1st half-page newspaper ad is published (NY Weekly Journal)
 - 
  
  The first united states hospital is put into place in Pennsylvania
 - 
  
  The United States Post Office Department is established, signed into law by President George Washington.
 - 
  
  The New York Stock Exchange is founded
 - 
  
  Levi Strauss invents jeans which makes him rich and provides many people with tough clothing.
 - 
  
  The General Electric Company is formed, merging the Edison General Electric Company with the Thomson-Houston Company.
 - 
  
  The first movie theatre in the United States opens in Los Angeles, California. It was known as the Electric Theatre.
 - 
  
  Henry Ford introduces the assembly line in his car building factory.
 - 
  
  Carrier Engineering is founded, beginning the commercialization of air conditioning
 - 
  
  The first U.S. supermarket, King Kullen, opens