| A | B |
| Knights of Labor | universal labor union led by Terence V. Powderly that worked for an 8-hour day, equal pay for equal work, and an end to child labor |
| Haymarket Riot | clash between striking workers and police in Chicago during a strike against the McCormick Corp. This led to a decline of the Knights of Labor's power. |
| anarchists | individuals who opposed all forms of government and often engaged in violence against the government and large corporations |
| blacklists | tactic used by companies against labor organizers by putting their names on a list and sending it to other companies to prevent the organizers from getting hired |
| yellow-dog contracts | agreement signed by a worker when he is hired stating that he will not join a labor union |
| lockout | refusal of a company to let workers come into work until they promise to stop union activities and demands |
| strikebreakers | workers hired to replace union workers who go on strike |
| American Federation of Labor | group of craft unions open only to skilled workers led by Samuel Gompers that worked for shorter hours, better conditions, and higher pay |
| American Railway Union | an industrial union lled by Eugene V. Debs that organized anyone who worked in the railroad industry and led a strike against the Pullman Company in 1894 |