TA Engineering (General). Civil engineering (General) 515 TK Electrical engineering. Electronics Nuclear engineering 466 QA75 Electronic computers. Computer science 397 HD28 Management. Industrial Management 306 TJ Mechanical engineering and machinery 306 TP Chemical technology 262 TH Building construction 179 QA Mathematics 171 L Education (General) 153 LB Theory and practice of education 137 NA Architecture 103 HD Industries. Land use. Labor 89 QA76 Computer software 89 T Technology (General) 81 Q Science (General) 74 QD Chemistry 70 HD1394-1394.5 Real estate management 69 QC Physics 58 G70.212-70.215 Geographic information system 54 BP Islam. Bahaism. Theosophy, etc 50 Unspecified 48 HF Commerce 35 QE Geology 35 HE Transportation and Communications 34 TD Environmental technology. Sanitary engineering 34 HT101-395 Sociology, Urban 32 TS Manufactures 31 K Law (General) 30 TH434-437 Quantity surveying 30 H Social Sciences (General) 26