TA Engineering (General). Civil engineering (General) 23 TK Electrical engineering. Electronics Nuclear engineering 9 TJ Mechanical engineering and machinery 8 NA Architecture 4 QA Mathematics 4 HD28 Management. Industrial Management 3 QA75 Electronic computers. Computer science 3 QE Geology 3 TH Building construction 3 TP Chemical technology 3 HD Industries. Land use. Labor 2 HD1394-1394.5 Real estate management 2 LB Theory and practice of education 2 Q Science (General) 2 QD Chemistry 2 T Technology (General) 2 G Geography (General) 1 GE Environmental Sciences 1 H Social Sciences (General) 1 HE Transportation and Communications 1 HF5549.5.M63 Employee motivation 1 JS Local government Municipal government 1 K Law (General) 1 L Education (General) 1 QC Physics 1 T58.5-58.64 Information technology 1 TC Hydraulic engineering. Ocean engineering 1 TD Environmental technology. Sanitary engineering 1 TE Highway engineering. Roads and pavements 1 TG Bridge engineering 1