TP Chemical technology 210 TA Engineering (General). Civil engineering (General) 164 HD28 Management. Industrial Management 147 TJ Mechanical engineering and machinery 141 TK Electrical engineering. Electronics Nuclear engineering 91 HD Industries. Land use. Labor 90 T Technology (General) 69 QA75 Electronic computers. Computer science 56 TH Building construction 51 HD28-70 Management. Industrial Management 48 Q Science (General) 30 QD Chemistry 29 Malaysia 27 Management. Industrial Management 26 QA76 Computer software 25 TH1-9745 Building construction 24 QA Mathematics 22 TS Manufactures 21 New Zealand 19 TD Environmental technology. Sanitary engineering 19 H Social Sciences (General) 17 Hospitality industry. Hotels, clubs, restaurants, etc. Food service 15 NA Architecture 14 QC Physics 13 Food industry and trade. Halal food industry. Certification 11 L Education (General) 10 Construction industry 9 Electronic data processing. Information technology. Knowledge economy. Including artificial intelligence and knowledge management 9 Extraction (Chemistry) 8 G70.212-70.215 Geographic information system 8