A semitone, also called a half step or a half tone, is the smallest musical interval commonly used in Western tonal music, and it is considered the most dissonant when sounded harmonically. It is defined as the interval between two adjacent notes in a 12-tone scale (e.g. from C to C â¯).
The National Labor Union. The first large-scale U.S. union was the National Labor Union, founded in 1866 to organize skilled and unskilled laborers, farmers, and factory workers.
(March 2011) The International Ladies' Garment Workers' Union (ILGWU) was once one of the largest labor unions in the United States, one of the first U.S. unions to have a primarily female membership, and a key player in the labor history of the 1920s and 1930s.