TK Electrical engineering. Electronics Nuclear engineering 22 TJ Mechanical engineering and machinery 12 HD28 Management. Industrial Management 5 LB Theory and practice of education 3 QA75 Electronic computers. Computer science 3 TA Engineering (General). Civil engineering (General) 3 TP Chemical technology 3 Q Science (General) 2 QA Mathematics 2 T58.5-58.64 Information technology 2 G70.212-70.215 Geographic information system 1 HB Economic Theory 1 HE Transportation and Communications 1 HF5549.5.M63 Employee motivation 1 Q Science 1 QA76 Computer software 1 QC Physics 1 QD Chemistry 1 TC Hydraulic engineering. Ocean engineering 1 TK5015.888 Web sites 1 TK7885-7895 Computer engineer. Computer hardware 1 TL Motor vehicles. Aeronautics. Astronautics 1 Unspecified 1