QA75 Electronic computers. Computer science 250 TK Electrical engineering. Electronics Nuclear engineering 227 TA Engineering (General). Civil engineering (General) 139 TJ Mechanical engineering and machinery 88 QA Mathematics 49 HD28 Management. Industrial Management 48 QA76 Computer software 40 TH Building construction 32 TP Chemical technology 32 T Technology (General) 24 NA Architecture 22 L Education (General) 21 Q Science (General) 21 LB Theory and practice of education 19 HD Industries. Land use. Labor 18 HD1394-1394.5 Real estate management 18 Unspecified 18 TK7885-7895 Computer engineer. Computer hardware 14 HF Commerce 12 TS Manufactures 11 TK5101-6720 Telecommunication 10 QD Chemistry 9 T58.5-58.64 Information technology 8 BP Islam. Bahaism. Theosophy, etc 7 G70.212-70.215 Geographic information system 7 HE Transportation and Communications 6 HT101-395 Sociology, Urban 6 TH434-437 Quantity surveying 6 HG Finance 5 LB1603 Secondary Education. High schools 5