TA Engineering (General). Civil engineering (General) 291 TP Chemical technology 139 TJ Mechanical engineering and machinery 122 TK Electrical engineering. Electronics Nuclear engineering 94 QD Chemistry 84 HD28 Management. Industrial Management 78 QC Physics 63 QA75 Electronic computers. Computer science 58 L Education (General) 45 T Technology (General) 41 TH Building construction 41 LB Theory and practice of education 36 HD Industries. Land use. Labor 30 NA Architecture 29 QA Mathematics 27 Q Science (General) 23 G70.212-70.215 Geographic information system 20 H Social Sciences (General) 18 QA76 Computer software 14 Unspecified 14 HD1394-1394.5 Real estate management 13 HT101-395 Sociology, Urban 13 HE Transportation and Communications 11 QH301 Biology 10 TH434-437 Quantity surveying 10 BP Islam. Bahaism. Theosophy, etc 9 HF Commerce 9 HF5549.5.M63 Employee motivation 7 LB2300 Higher Education 7 TS Manufactures 7