TA Engineering (General). Civil engineering (General) 51 QA75 Electronic computers. Computer science 42 QA76 Computer software 20 HD28 Management. Industrial Management 17 T Technology (General) 8 TK Electrical engineering. Electronics Nuclear engineering 8 G70.212-70.215 Geographic information system 7 HD Industries. Land use. Labor 6 NA Architecture 4 TH Building construction 4 TJ Mechanical engineering and machinery 4 G70.39-70.6 Remote sensing 3 L Education (General) 3 TK7885-7895 Computer engineer. Computer hardware 3 H Social Sciences (General) 2 HD1394-1394.5 Real estate management 2 HF Commerce 2 HG Finance 2 NA9000-9284 City planning 2 T58.5-58.64 Information technology 2 TH434-437 Quantity surveying 2 Unspecified 2 G Geography (General) 1 H Social Sciences 1 HD30.2 Knowledge management 1 HD30.213 Management information systems. Decision support systems 1 HE Transportation and Communications 1 HT Communities. Classes. Races 1 LB Theory and practice of education 1 LB1501 Primary Education 1