AFL-CIO: Federation of labor organizations. Contains links to member unions, speeches, organizing information

American Federation of Musicians: Founded in 1896, the AFM is an international union organized in the United States and Canada with its international headquarters in Toronto

American Federation of State, County, and Municipal Employees (AFSCME): Largest public employee and health care workers union in the United States

American Federation of Teachers: The AFT has more than one million members nationwide, and has grown into a trade union representing workers in education, health care, and public service

Communications Workers of America: Represents 600,000 workers in telecommunications, printing and news media, public service, health care, and other industries

Glass, Molders, Pottery International Union (GMP): Represents 62,000 men and women in many lines of work including the manufacture of fine china, glass and plastic containers, insulation, sanitary ware and a broad range of other products and services

International Alliance of Theatrical Stage Employees (IATSE): The stagehand's labor union representing technicians, artisans and craftspersons in the entertainment industry, including live theatre, film and television production in the US and Canada

International Association of Fire Fighters: Representing more than 240,000 professional fire fighters and emergency medical personnel in the United States and Canada

International Brotherhood of Electrical Workers (IBEW): Main website for IBEW, representing employees in the electrical and utilities industries

International Brotherhood of Teamsters (IBT): Representing employees in transportation, freight-related and other industries

International Cinematographers Guild: Labor union which represents cinematographers and photographers in the motion picture, television and commercial industry. Special sections on Academy Awards, Oscars

International Federation of Professional and Technical Engineers (IFPTE): Represents more than 75,000 workers in professional, technical, administrative and associated occupations in the private and public sectors

International Longshore and Warehouse Union (ILWU): AFL-CIO group with over 60 local unions in the Western United States and a marine division comprising the Inlandboatmen's Union of the Pacific

National Association of Letter Carriers: Founded in 1899 to represent letter carriers in the US; includes facts and history, news, legislative issues, local links, and membership information

National Treasury Employees Union (NTEU): The USA's largest independent federal sector union, representing employees of the Treasury Department and various federal agencies

United Auto Workers (UAW): Represents workers in the auto industry as well as aircraft manufacture and other industries in the U.S. -- Canadian section broke off to form the Canadian Auto Workers in the 1980s

United Brotherhood of Carpenters and Joiners of America: Features articles from the Carpenters Magazine in .pdf format and has a directory of UBC local offices

United Food and Commercial Workers International Union: Represents workers primarily in the food industry in the U.S. and Canada