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.
Out of labor organizing earlier in the decade emerged SolidarnoÅÄ (Solidarity), the first non-communist party-controlled trade union federation in a Warsaw Pact country (see Polish workers general strike for economic rights, 1980).