St. Petersburg Naval Institute Higher Naval School. Today, it is called the Peter the Great Naval Corps - St. Petersburg Naval Institute. Other Russian Navy officer commissioning schools include F.F. Ushakov Baltic Naval Institute in Kaliningrad; A.A. Popov Naval Radioelectronics Institute in Petrodvorets (St. Petersburg area); the Naval Engineering Institute in Pushkin (St. Petersburg area); S.O. Makarov Pacific Naval Institute in Vladivostok, and the P.S. Nakhimov Higher Naval School in Sevastopol. St. Petersburg Naval Institute The M.V. Frunze Higher Naval School, now known as Peter the Great Naval Corps - St. Petersburg Naval Institute, is the oldest of the Russian Navy's naval officer commissioning
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