Founded in 1847, the American Medical Association (AMA), the leading organization representing medical doctors in the United States . . .

The American Industrial Revolution (1877–1919) was an era in which the nation was transformed from its agrarian, rural roots to an increasingly urban, mechanized, and innovative power.

The American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) is a voluntary league of national labor unions representing over 13 million workers.