- Cryptology 19
- Computer Communication Networks 16
- Information Storage and Retrieval 12
- Management of Computing and Information Systems 12
- Database Management 11
- Computers and Society 8
- Operating Systems 8
- Information Systems Applications (incl. Internet) 7
- Systems and Data Security 7
- Algorithm Analysis and Problem Complexity 2
- Computer Systems Organization and Communication Networks 2
- Data Structures and Information Theory 2
- Legal Aspects of Computing 1
- Special Purpose and Application-Based Systems 1
- e-Commerce/e-business 1