International Seamen's Union ended in 1937.
International Mathematical Union ended in 1936.
International Labor Union ended in 1887.
International Typographical Union ended in 1986.
Retail Clerks International Union ended in 1979.
Cigar Makers' International Union ended in 1974.
International Working Union of Socialist Parties ended in 1923.
International Trade Union Educational League ended in 1917.
It was created in 1934. It was a merger of the International Telegraph Union and the International Radiotelegraph Union.
International Mathematical Union was created in 1919.
International Triathlon Union was created in 1989.
International Vegetarian Union was created in 1908.
International Skating Union was created in 1892.