1. West Ukrainian National University,Department of Computer Science,Ternopil,Ukraine
2. Wroclaw University of Economics and Business,Department of Information Systems,Wroclaw,Poland
3. Ternopil Volodymyr Hnatiuk National Pedagogical University,Department of computer technologies,Ternopil,Ukraine
4. West Ukrainian National University,Information and Communication Technologies,Department of Foreign Languages,Ternopil,Ukraine