- Cryptology 33
- Systems and Data Security 30
- Algorithm Analysis and Problem Complexity 18
- Management of Computing and Information Systems 17
- Computer Communication Networks 16
- Discrete Mathematics in Computer Science 12
- Coding and Information Theory 11
- Special Purpose and Application-Based Systems 6
- Information Systems Applications (incl. Internet) 4
- Computer System Implementation 3
- Computers and Society 3
- Data Structures and Information Theory 3
- Mathematics of Computing 3
- Applications of Mathematics 2
- Artificial Intelligence 2
- Communications Engineering, Networks 2
- Computer Hardware 2
- Computer Systems Organization and Communication Networks 2
- Control Structures and Microprogramming 2
- Logic Design 2