Optimal control system theory, Space flight mechanics, Applied statistics, Artificial intelligence, in particular, Distributed intelligence, Knowledge-based planning and scheduling, Pattern and knowledge discovery in databases, P2P data mining and knowledge discovery, Data and information fusion, Decision combining, Distributed classification, Multi-agent system technology and software tools, P2P agent systems and P2P Agent platform, and, Service-oriented multi-agent systems, Multi-agent applications, in particular, Computer network security, Air traffic control, Project management, Digital image steganography.