Study on Wide-ranging Ethical Implications of Big Data Technology in a Digital Society: How Likely Are Data Accidents in the COVID-19.- Application of business rules mechanism in IT systems projects.- Data-as-a-Service vs. Information-as-a-Service: Critical Differences in Theory, Implementation, and Applicability of Two Growing Cloud Services.- Management and Measuring Customer Loyalty in Digital Marketplace - Analysis of KPIs and Influence Factors in CLTV.- Cost-effective solutions in Cloud Computing security.- Marketing Communication and Its Role in the Process of Creating Rational Awareness of Generation Z Representatives.- How is Data Visualization shaping our life? The application of analytics from Google Trends during the epidemic of COVID-19.- Analysis of the practices of financial intelligence units (FIUs) and other anti-money laundering agencies within EU.- Modern Approaches to Leadership Development - An Overview.- Crowdfunding and Uncertain Decision Problems - Applying Shannon Entropy to Support Entrepreneurs.