Databases Artificial intelligence 13 Business mathematics & systems 8 Computer networking and communications 5 Data mining 5 Information retrieval 5 Communications engineering / telecommunications 4 Computer networking & communications 4 Computer science 4 Expert systems / knowledge-based systems 4 Information technology: general topics 4 Machine learning 4 Research & development management 4 Algorithms and data structures 3 Central government policies 3 Chemistry 3 Computer programming / software engineering 3 Geography 3 Library, archive & information management 3 Operating systems 3 Probability and statistics 3 Social issues & processes 3 Sociology 3 Agricultural science 2 Astronautics 2 Business and Management 2 Business applications 2 Computer programming / software development 2 Computer security 2 Database systems 2