TA Engineering (General). Civil engineering (General) 11 QA75 Electronic computers. Computer science 6 TK Electrical engineering. Electronics Nuclear engineering 6 QC Physics 5 TJ Mechanical engineering and machinery 4 HD1394-1394.5 Real estate management 3 HD28 Management. Industrial Management 3 TP Chemical technology 3 HF Commerce 2 QE Geology 2 TC Hydraulic engineering. Ocean engineering 2 G70.212-70.215 Geographic information system 1 HE Transportation and Communications 1 LB Theory and practice of education 1 NK Decorative arts Applied arts Decoration and ornament 1 QD Chemistry 1 S Agriculture (General) 1 T Technology (General) 1 T58.5-58.64 Information technology 1 TH434-437 Quantity surveying 1 TL Motor vehicles. Aeronautics. Astronautics 1 VM Naval architecture. Shipbuilding. Marine engineering 1 Z Bibliography. Library Science. Information Resources 1