- Computer Communication Networks (4)
- Computer Science (4)
- Computer Systems Organization and Communication Networks (4)
- Information Systems and Communication Service (4)
- Information Systems Applications (incl.Internet) (3)
- System Performance and Evaluation (3)
- Coding and Information Theory (1)
- Communications Engineering, Networks (1)
- Data Encryption (1)
- Multimedia Information Systems (1)
- Systems and Data Security (1)