Expert systems / knowledge-based systems 52 Knowledge based systems 34 Artificial intelligence 33 Information retrieval 16 Network hardware 16 Software Engineering 14 Data mining 12 Information technology: general topics 12 Machine learning 11 Databases 8 Computer science 7 Information technology: general issues 7 Knowledge based 6 Systems analysis & design 6 Systems analysis and design 6 User interface design & usability 6 Algorithms and data structures 5 Natural language and machine translation 5 User interface design and usability 5 Algorithms & data structures 4 Computational and corpus linguistics 4 Computer networking & communications 4 Computer networking and communications 4 Image processing 4 Mathematical theory of computation 4 Operating systems 4 Public administration 4 Algorithms 3 Business mathematics & systems 3 Business mathematics and systems 3