St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences The St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences (SPIIRAS) () is a federal state budgetary institution of science located in St. Petersburg, Russia. It was founded on by a Decree of the Council of Ministers of the USSR. The official foundation date is , according to a Decree of the Presidium of the USSR Academy of Sciences. The main research fields of the institute are computer science, intelligent automation systems and information technologies. The Institute is located in the building of
20th-century classical music explored in their respective articles. At the end of the 19th century (often called the "Fin de siècle"), the Romantic style was starting to break apart, moving along various parallel courses, such as Impressionism and Post-romanticism. In the 20th century, the different styles that emerged from the music of the previous century influenced composers to follow new trends, sometimes as a reaction to that music, sometimes as an extension of it, and both trends co-existed well into the 20th century. The former trends, such as Expressionism are discussed later. In the early part of the 20th century, many composers wrote