TK Electrical engineering. Electronics Nuclear engineering 19 TA Engineering (General). Civil engineering (General) 10 TJ Mechanical engineering and machinery 9 QA75 Electronic computers. Computer science 5 TP Chemical technology 4 HE Transportation and Communications 3 HF Commerce 2 QC Physics 2 QE Geology 2 TC Hydraulic engineering. Ocean engineering 2 BP Islam. Bahaism. Theosophy, etc 1 G70.212-70.215 Geographic information system 1 HD28 Management. Industrial Management 1 HD30.2 Knowledge management 1 LB Theory and practice of education 1 LC Special aspects of education 1 NA Architecture 1 Q Science (General) 1 T Technology (General) 1 T58.5-58.64 Information technology 1 TH Building construction 1 TH434-437 Quantity surveying 1 TK5101-6720 Telecommunication 1 TX Home economics 1