QA75 Electronic computers. Computer science 9 L Education (General) 7 BP Islam. Bahaism. Theosophy, etc 4 HD28 Management. Industrial Management 3 HT101-395 Sociology, Urban 3 QE Geology 3 HD Industries. Land use. Labor 2 HD1394-1394.5 Real estate management 2 NA Architecture 2 TK Electrical engineering. Electronics Nuclear engineering 2 Unspecified 2 G70.212-70.215 Geographic information system 1 H Social Sciences (General) 1 HF Commerce 1 HT Communities. Classes. Races 1 K Law (General) 1 QA Mathematics 1 QA76 Computer software 1 T Technology (General) 1 TA Engineering (General). Civil engineering (General) 1 TH Building construction 1 TJ Mechanical engineering and machinery 1 TS Manufactures 1