Industrial unions organized workers industry wide including unskilled with
skilled workers rather than following strict craft lines like traditional
unions. Many of the new industrial unions arose in the 1930's with
the Congress of Industrial Organizations (CIO).
Pittsburgh with its powerful work force of Steelworkers, Electrical Workers, Mine Workers and even Shipbuilders was one of the main centers of this development.
For exploration of the history of these important unions click on the links above.