L Education (General) 31 LB Theory and practice of education 24 HD28 Management. Industrial Management 18 TA Engineering (General). Civil engineering (General) 17 QA75 Electronic computers. Computer science 14 TH Building construction 12 NA Architecture 8 H Social Sciences (General) 7 G70.212-70.215 Geographic information system 6 HD Industries. Land use. Labor 6 T Technology (General) 6 QE Geology 5 BP Islam. Bahaism. Theosophy, etc 4 TP Chemical technology 4 G154.9-155.8 Travel and state. Tourism 3 HD1394-1394.5 Real estate management 3 HE Transportation and Communications 3 HT101-395 Sociology, Urban 3 LB1603 Secondary Education. High schools 3 BF Psychology 2 HF5549.5.M63 Employee motivation 2 LB2300 Higher Education 2 QD Chemistry 2 T58.5-58.64 Information technology 2 BL Religion 1 BV1460 Religious Education 1 GE Environmental Sciences 1 HA Statistics 1 HB Economic Theory 1 HD30.213 Management information systems. Decision support systems 1