Technology: general issues 13 History of engineering & technology 10 Artificial intelligence 9 Computer vision 8 Computer networking & communications 6 Software Engineering 6 Computer science 5 Computer programming / software development 4 Expert systems / knowledge-based systems 4 Humanities 4 Information technology: general issues 4 Social interaction 4 Electrical engineering 3 Imaging systems & technology 3 Information retrieval 3 Medicine 3 Research & information: general 3 User interface design & usability 3 Coding theory & cryptology 2 Computer security 2 Geography 2 Image processing 2 Information technology industries 2 Mobile phone technology 2 Network hardware 2 Network security 2 Neurosciences 2 Signal processing 2 Systems analysis & design 2 Acoustic & sound engineering 1