The Amalgamated Association of Iron and Steel Workers was a labor union that represented workers in the iron and steel industry. The union was founded in 1876 and was one of the first national labor unions in the United States.

The National Labor Relations Act, also known as the Wagner Act, was a law that was passed in 1935 to protect the rights of workers to organize and bargain collectively. The law also created the National Labor Relations Board, which was responsible for enforcing the law.

The Brotherhood of Locomotive Engineers was a labor union that represented locomotive engineers. The union was founded in 1863 and was one of the first national labor unions in the United States. The union led the Great Railroad Strike of 1877, which was a major turning point in the history of labor relations in the United States.

The Fair Labor Standards Act was a law that was passed in 1938 to establish a minimum wage and maximum hours for workers. The law also prohibited child labor and required employers to pay overtime pay for hours worked over 40 hours per week.

The American Railway Union was a labor union that represented railroad workers. The union was founded in 1893 and was led by Eugene V. Debs. The union led the Pullman Strike of 1894, which was a major turning point in the history of labor relations in the United States.

The Clayton Act was a law that was passed in 1920 to protect the rights of workers to organize and bargain collectively. The law also prohibited employers from engaging in unfair labor practices, such as blacklisting and yellow-dog contracts.

The International Working People's Association was a labor union that was founded in 1864. The union was also known as the First International. The union led the Haymarket Affair of 1886, which was a major turning point in the history of labor relations in the United States.

The Adamson Act was a law that was passed in 1916 to establish an eight-hour workday for federal employees. The law also prohibited employers from requiring employees to work more than 10 hours per day or 54 hours per week.

The United Mine Workers of America was a labor union that represented coal miners. The union was founded in 1890 and was one of the most powerful labor unions in the United States. The union led the United Mine Workers of America Strike of 1946, which was a major turning point in the history of labor relations in the United States.

The Social Security Act was a law that was passed in 1935 to establish a social insurance program for workers. The law provided benefits for workers who were unemployed, disabled, or retired. The law also provided benefits for the families of workers who died.

The United Textile Workers of America was a labor union that represented textile workers. The union was founded in 1934 and was one of the most powerful labor unions in the United States. The union led the Great Textile Strike of 1934, which was a major turning point in the history of labor relations in the United States.

The Civil Rights Act of 1964 was a law that was passed in 1963 to prohibit discrimination in employment based on race, color, religion, sex, or national origin. The law also prohibited discrimination in public accommodations, such as hotels, restaurants, and theaters.

The Professional Air Traffic Controllers Organization was a labor union that represented air traffic controllers. The union was founded in 1968 and was one of the most powerful labor unions in the United States. The union led the PATCO Strike of 1981, which was a major turning point in the history of labor relations in the United States.

The Occupational Safety and Health Act was a law that was passed in 1970 to protect the rights of workers to organize and bargain collectively. The law also established the Occupational Safety and Health Administration, which was responsible for enforcing the law.

The United Farm Workers of America was a labor union that represented farm workers. The union was founded in 1962 and was one of the most powerful labor unions in the United States. The union led the United Farm Workers Strike of 1965, which was a major turning point in the history of labor relations in the United States.