TA Engineering (General). Civil engineering (General) 63 HD28 Management. Industrial Management 54 HD1394-1394.5 Real estate management 25 TP Chemical technology 22 TJ Mechanical engineering and machinery 19 TH Building construction 17 T Technology (General) 14 NA Architecture 12 HT101-395 Sociology, Urban 11 QA75 Electronic computers. Computer science 11 G70.212-70.215 Geographic information system 9 H Social Sciences (General) 8 TD Environmental technology. Sanitary engineering 8 HB615-715 Entrepreneurship. Risk and uncertainty. Property 5 TK Electrical engineering. Electronics Nuclear engineering 5 G154.9-155.8 Travel and state. Tourism 4 GE Environmental Sciences 4 HD30.213 Management information systems. Decision support systems 4 HT Communities. Classes. Races 4 L Education (General) 4 G Geography (General) 3 G70.39-70.6 Remote sensing 3 HD Industries. Land use. Labor 3 HF Commerce 3 NA9000-9284 City planning 3 Q Science (General) 3 QD Chemistry 3 BP Islam. Bahaism. Theosophy, etc 2 QA76 Computer software 2 V Naval Science (General) 2