TA Engineering (General). Civil engineering (General) 198 TK Electrical engineering. Electronics Nuclear engineering 134 TJ Mechanical engineering and machinery 70 QA75 Electronic computers. Computer science 35 TP Chemical technology 34 TH Building construction 28 HD28 Management. Industrial Management 26 LB Theory and practice of education 25 L Education (General) 23 NA Architecture 20 QD Chemistry 15 Unspecified 11 HT101-395 Sociology, Urban 10 G70.212-70.215 Geographic information system 9 QA76 Computer software 9 QC Physics 9 T Technology (General) 9 HE Transportation and Communications 8 QA Mathematics 8 Q Science (General) 7 TG Bridge engineering 7 QE Geology 6 HD Industries. Land use. Labor 5 HF5549.5.M63 Employee motivation 5 TH434-437 Quantity surveying 5 HD1394-1394.5 Real estate management 4 HF Commerce 4 TK5101-6720 Telecommunication 4 TS Manufactures 4 BP Islam. Bahaism. Theosophy, etc 3