TJ Mechanical engineering and machinery 26 L Education (General) 10 PE English language 2 TK Electrical engineering. Electronics Nuclear engineering 2 Air quality 1 Ambient air quality 1 Attribution of news. Reporters and reporting 1 Banking 1 Cognitive learning. Thinking skills. Critical thinking 1 Computer network resources. Internet in education. Web-based instruction 1 Consumer behavior. Consumers' preferences. Consumer research. Including consumer profiling 1 Correlation analysis 1 Dyes 1 Education of special classes of persons 1 Educational area 1 Educational evaluation 1 Educational tests and measurements 1 Electronic data processing. Information technology. Knowledge economy. Including artificial intelligence and knowledge management 1 Engineering education 1 English language 1 Facebook 1 Flocculation, precipitation, adsorption, etc. Coagulation 1 H Social Sciences (General) 1 Higher Education 1 Housing 1 Instructional systems 1 Knowledge management. Organizational learning 1 Laser particle counters 1 NA Architecture 1 PLGA 1