HD28 Management. Industrial Management 37 TA Engineering (General). Civil engineering (General) 15 TK Electrical engineering. Electronics Nuclear engineering 15 QA75 Electronic computers. Computer science 13 TP Chemical technology 8 QA76 Computer software 7 H Social Sciences (General) 6 TJ Mechanical engineering and machinery 5 G70.212-70.215 Geographic information system 4 HD1394-1394.5 Real estate management 3 HD30.213 Management information systems. Decision support systems 3 HF Commerce 3 TH Building construction 3 G154.9-155.8 Travel and state. Tourism 2 HD Industries. Land use. Labor 2 NA Architecture 2 Q Science (General) 2 QD Chemistry 2 QE Geology 2 T Technology (General) 2 Unspecified 2 AC Collections. Series. Collected works 1 BP Islam. Bahaism. Theosophy, etc 1 G Geography (General) 1 HB615-715 Entrepreneurship. Risk and uncertainty. Property 1 HE Transportation and Communications 1 HT101-395 Sociology, Urban 1 HV Social pathology. Social and public welfare 1 LB Theory and practice of education 1 NA9000-9284 City planning 1