Title	Branding and Advertising on Social Networks: Current Trends
Author	Tetiana Trachuk, Olga Vdovichena, Mariia Andriushchenko, Olha Semenda, Maryna Pashkevych
Citation	Vol. 21  No. 4  pp. 178-185
Keywords	branding on social networks, advertising on social networks, Instagram branding, brand positioning, brand content strategy.

Title	DEVELOPMENT TRENDS OF THE DIGITAL ECONOMY: E-BUSINESS, E-COMMERCE
Author	Nelia Volkova, Ihor Kuzmuk, Nataliia Oliinyk, Iryna Klymenko, Andrii Dankanych
Citation	Vol. 21  No. 4  pp. 186-198
Keywords	digitalization, e-business, e-commerce, EU countries, platforming, Internet of Things, artificial intelligence, robotics, value chain.

Title	A Systematic Study of Network Firewall and Its Implementation
Author	Raed Alsaqour, Ahmed Motmi, Maha Abdelhaq
Citation	Vol. 21  No. 4  pp. 199-208
Keywords	Firewall; Firewall issues; Firewall types; Firewall vulnerabilities; Firewall architecture

Title	A Better Prediction for Higher Education Performance using the Decision Tree
Author	Anwar Hilal, Abu Sarwar Zamani, Sultan Ahmad, Mohammad Rizwanullah
Citation	Vol. 21  No. 4  pp. 209-213
Keywords	Data Mining, KDD, Algorithm, Extracting Patterns..