Semantic computing Database searching 4 Natural language processing (Computer science) 4 Computer networks 3 Computer security 3 Information retrieval 3 Multimedia systems 3 Security measures 3 Context-aware computing 2 Human-computer interaction 2 Metadata 2 Methodology 2 Semantics (Philosophy) 2 Streaming video 2 System theory 2 Artificial intelligence 1 Logic programming 1 Management information systems 1 Ontologies (Information retrieval) 1 Querying (Computer science) 1 Semantic Web 1 Semantic networks (Information theory) 1