QA75 Electronic computers. Computer science 45 Q Science (General) 22 QD Chemistry 20 H Social Sciences (General) 18 TP Chemical technology 16 Q Science 10 L Education (General) 9 BP Islam. Bahaism. Theosophy, etc 8 T Technology (General) 8 TA Engineering (General). Civil engineering (General) 7 QC Physics 5 TK Electrical engineering. Electronics Nuclear engineering 4 ZA4050 Electronic information resources 4 HD28 Management. Industrial Management 3 LB Theory and practice of education 3 TJ Mechanical engineering and machinery 3 QA Mathematics 2 QA76 Computer software 2 ZA Information resources 2 GE Environmental Sciences 1 HB Economic Theory 1 HD Industries. Land use. Labor 1 HD1394-1394.5 Real estate management 1 HD30.2 Knowledge management 1 HF5549.5.M63 Employee motivation 1 HT101-395 Sociology, Urban 1 JA Political science (General) 1 LB1603 Secondary Education. High schools 1 NA Architecture 1 P Philology. Linguistics 1