The international conference “Computer Sciences and Information Technologies” was established in 2004. Since the early years it was annually organized with the principal aim to discuss the modern trend in computer sciences, information technologies, applied linguistics and others related areas. In the first years, only Ukrainian and Polish scientists and researchers took part in this event. Later also participants from other countries such as Russia, Czech Republic, Slovakia, Serbia, Hungary, Turkey, Canada, OAE and Lithuania became regular participants. Organizers of conference hope that wide subjects and the fruitful international sciences environment may result in expansion of ideas and bring new trends in the development of the already well-established area of research. Welcome to the X International Scientific and Technical Conference “Computer Sciences and Information Technologies” (CSIT’2015) which will be held September 14 – 17 , 2015 at Lviv Polytechnic National University (Lviv, Ukraine).