TA Engineering (General). Civil engineering (General) 33 TP Chemical technology 14 TD Environmental technology. Sanitary engineering 8 HD1394-1394.5 Real estate management 6 HD28 Management. Industrial Management 6 TH Building construction 6 GE Environmental Sciences 4 QA75 Electronic computers. Computer science 3 TK Electrical engineering. Electronics Nuclear engineering 3 Unspecified 3 H Social Sciences (General) 2 NA Architecture 2 TJ Mechanical engineering and machinery 2 G70.39-70.6 Remote sensing 1 HD Industries. Land use. Labor 1 HF Commerce 1 Q Science (General) 1 QA Mathematics 1 QD Chemistry 1 QH Natural history 1 T Technology (General) 1 TH434-437 Quantity surveying 1