TA Engineering (General). Civil engineering (General) 51 QA75 Electronic computers. Computer science 34 G70.212-70.215 Geographic information system 16 TJ Mechanical engineering and machinery 14 TK Electrical engineering. Electronics Nuclear engineering 11 HD28 Management. Industrial Management 10 QA76 Computer software 8 TP Chemical technology 8 HD Industries. Land use. Labor 7 HD1394-1394.5 Real estate management 7 L Education (General) 5 QE Geology 5 T Technology (General) 5 QA Mathematics 4 TH Building construction 4 QH Natural history 3 TH434-437 Quantity surveying 3 TK7885-7895 Computer engineer. Computer hardware 3 H Social Sciences (General) 2 HD30.213 Management information systems. Decision support systems 2 HE Transportation and Communications 2 HT101-395 Sociology, Urban 2 NA Architecture 2 Q Science (General) 2 T58.5-58.64 Information technology 2 TD Environmental technology. Sanitary engineering 2 TS Manufactures 2 BV1460 Religious Education 1 GV Recreation Leisure 1 HF Commerce 1