Title	Characterizing Combatants of State-Sponsored APT in Digital Warfare by Reported Blocklist Database
Author	Ruo Ando and Hiroshi Itoh
Citation	Vol. 22  No. 3  pp. 541-546
Keywords	Digital warfare, APT, Grizzly Steppe, Hidden Cobra, reported blocklist database.

Title	The Use of Digital Open Systems in the Preparation of Students
Author	Myroslav Koval, Svitlana Kryshtanovych, Albina Kovtun, Mykola Dubinka, Olena Fuchyla
Citation	Vol. 22  No. 3  pp. 535-540
Keywords	Digital Open Systems, Information and Communication Technologies, Educational Environment, Students.

Title	Ecological and Psychological Features of the Play Space Organization of Students with Using a Computer Technologies
Author	Oksana Bondar, Anna Polishchuk, Alla Tymchenko, Inna Kulish, Iryna Zabiiaka, Ganna Plakhotniuk
Citation	Vol. 22  No. 3  pp. 525-534
Keywords	ecological education, play space, high educational institution, means of computer technologies, culture of life safety.

Title	On the implementation of Implicit Methods to Solve Initial Values Problems for Ordinary Differential Equations
Author	Badreldin O. S. Elgabbani, Othman A. Alrusaini, Emad A. Shafie
Citation	Vol. 22  No. 3  pp. 517-524
Keywords	Ordinary differential equation; Butcher; Runge-Kutta; implicit;, Array