TA Engineering (General). Civil engineering (General) 127 TH Building construction 50 HD28 Management. Industrial Management 37 HD Industries. Land use. Labor 8 QE Geology 7 HD1394-1394.5 Real estate management 6 T Technology (General) 6 TJ Mechanical engineering and machinery 6 QA75 Electronic computers. Computer science 5 TD Environmental technology. Sanitary engineering 5 HD61 Risk Management 4 QA76 Computer software 4 NA9000-9284 City planning 3 TH434-437 Quantity surveying 3 Unspecified 3 K Law (General) 2 NA Architecture 2 G Geography (General) 1 G154.9-155.8 Travel and state. Tourism 1 G70.212-70.215 Geographic information system 1 G70.39-70.6 Remote sensing 1 H Social Sciences (General) 1 HB Economic Theory 1 HC Economic History and Conditions 1 HF Commerce 1 HG Finance 1 Q Science (General) 1 TE Highway engineering. Roads and pavements 1 TF Railroad engineering and operation 1 TP Chemical technology 1