- Computer Communication Networks 24
- Cryptology 22
- Systems and Data Security 16
- Information Systems Applications (incl. Internet) 7
- Coding and Information Theory 6
- Data Structures and Information Theory 6
- Software Engineering/Programming and Operating Systems 6
- Management of Computing and Information Systems 5
- Computers and Society 4
- Information Systems and Communication Service 4
- Security Services 4
- Computer System Implementation 3
- Special Purpose and Application-Based Systems 3
- Algorithm Analysis and Problem Complexity 2
- Computer Hardware 2
- Discrete Mathematics in Computer Science 2
- Mobile and Network Security 2
- Artificial Intelligence 1
- Computer Applications 1
- Computer Systems Organization and Communication Networks 1