St. Petersburg Workers' Organisation St. Petersburg Workers' Organisation St. Petersburg Workers' Organisation was a socialist group, oriented towards economism, in St. Petersburg, Russian Empire. It was set up in the summer of 1900. Its appeal 'To the Workers of All Factories', published in its newspaper "Rabochaya Mysl" (, "Workers' Thought") No. 9, September 1900, called on the workers to organise circles for the working out of a programme of struggle and for mutual assistance. In the autumn of 1900, the Workers' Organisation merged with the St. Petersburg League of Struggle for the Emancipation of the Working Class. The programme and charter of this united
20th-century music had earlier been called race music, and country music. See also rock musical and rock opera. 20th-century music During the 20th century there was a huge increase in the variety of music that people had access to. Prior to the invention of mass market gramophone records (developed in 1892) and radio broadcasting (first commercially done ca. 1919–20), people mainly listened to music at live Classical music concerts or musical theatre shows, which were too expensive for many lower-income people; on early phonograph players (a technology invented in 1877 which was not mass-marketed until the mid-1890s); or by individuals performing music