TA Engineering (General). Civil engineering (General) 48 QA75 Electronic computers. Computer science 33 HD28 Management. Industrial Management 32 H Social Sciences (General) 15 TH Building construction 14 HD1394-1394.5 Real estate management 13 TK Electrical engineering. Electronics Nuclear engineering 10 HD Industries. Land use. Labor 9 T Technology (General) 9 G70.212-70.215 Geographic information system 8 NA Architecture 8 QE Geology 8 HT101-395 Sociology, Urban 7 QA76 Computer software 6 BP Islam. Bahaism. Theosophy, etc 5 L Education (General) 5 LB Theory and practice of education 5 TH434-437 Quantity surveying 5 TJ Mechanical engineering and machinery 5 HG Finance 4 TD Environmental technology. Sanitary engineering 4 GV Recreation Leisure 3 HE Transportation and Communications 3 HF Commerce 3 K Law (General) 3 LB2300 Higher Education 3 TE Highway engineering. Roads and pavements 3 Unspecified 3 BV1460 Religious Education 2 GE Environmental Sciences 2