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.
The IWW also promotes the class-based concept of One Big Union. The IWW was formed by militant unionists, socialists, anarchists, and other labor radicals who believed that the great mass of workers are exploited by, and are in an economic struggle with, an employing class.