Mathematics 10 Windows 10 C++ (Computer program language) 9 Internet 8 System analysis 7 Database management 6 Object - oriented programming 6 Operating systems (Computers) 6 C (Computer program language) 5 Data processing 5 Operations research 5 System design 5 Computer graphics 4 Computer networks 4 Databases 4 Electronic digital computers 4 Information systems 4 Java (Computer program language) 4 Network 4 Networking 4 Object-oriented programming 4 Programming 4 Programming (Mathematics) 4 Relational databases 4 SQL 4 Software engineering 4 UNIX 4 Visual C++ 4 Coding theory 3 Computer architecture 3