Listed alphabetically, by trade.

Actors (SAG-AFTRA - Screen Actors Guild American Federation of Television & Radio Artists)
www.sagaftra.org

Asbestos Workers (AWIU – International Association of Heat and Frost Insulators and Asbestos Workers)
www.insulators.org

Automobile & Implement Workers (UAW – United Automobile, Aerospace & Agricultural Implement Workers of America)
www.uaw.org

Bakery Workers (BCTGM – Bakery, Confectionery, Tobacco Workers & Grain Millers International Union)
www.bctgm.org

Boilermakers (IBB – International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers)
www.boilermakers.org

Bricklayers (BAC – International Union of Bricklayers, and Allied Craft Workers)
www.bacweb.org

Communications Workers (CWA – Communications Workers of America)
www.cwa-union.org

Electrical Workers (IBEW – International Brotherhood of Electrical Workers)
www.ibew.org

Elevator Constructors (IUEC – International Union of Elevator Constructors)
www.iuec.org

Fire Fighters (IAFF – International Association of Fire Fighters)
www.affi-iaff.org

Flight Attendants (AFA – Association of Flight Attendants)

Flint Glass Makers (AIGWU – American Flint Glass Workers Union)

Food & Commercial Workers (UFCW - United Food & Commercial Workers)
www.ufcw.org

Glass, Molders, Pottery & Plastics Workers (GMP – Glass, Molders, Pottery, Plastics and Allied Workers International Union)
www.gmpiu.org

Government Employees (AFGE – American Federation of Government Employees)
www.afge.org

Graphic Communications Employees (GCIU – Graphics Communications International Union)
www.gciu.org