SYSTEM MANAGEMENT + SYSTEM ADMINISTRATION (MANAGEMENT OF COMPUTER SYSTEMS); SYSTEMMANAGEMENT + SYSTEMADMINISTRATION (MANAGEMENT VON COMPUTERSYSTEMEN); ELEKTRONISCHER HANDEL + ELEKTRONISCHER MARKT + DIGITAL ECONOMY; DATA SECURITY + DATA PROTECTION (OPERATING SYSTEMS); ELECTRONIC COMMERCE + ELECTRONIC MARKETS + DIGITAL ECONOMY; NETZWERKÜBERWACHUNG + NETZWERKADMINISTRATION (COMPUTERSYSTEME); NETWORK MONITORING (COMPUTER SYSTEMS); RISK MANAGEMENT (BUSINESS ECONOMICS); DATENSICHERHEIT + DATENSCHUTZ (BETRIEBSSYSTEME); RISIKOMANAGEMENT (BETRIEBSWIRTSCHAFT)