T Technology (General) 48 TJ Mechanical engineering and machinery 27 TP Chemical technology 27 TK Electrical engineering. Electronics Nuclear engineering 17 HD28 Management. Industrial Management 14 TA Engineering (General). Civil engineering (General) 14 TS Manufactures 12 TD Environmental technology. Sanitary engineering 8 HD Industries. Land use. Labor 6 QA75 Electronic computers. Computer science 6 T58.5-58.64 Information technology 4 G Geography (General) 3 QC Physics 3 H Social Sciences (General) 2 HF Commerce 2 Q Science (General) 2 QA76 Computer software 2 T Technology 2 HB Economic Theory 1 HD30.2 Knowledge management 1 HF5549.5.M63 Employee motivation 1 HF5601 Accounting 1 HG Finance 1 QK Botany 1 TE Highway engineering. Roads and pavements 1 VM Naval architecture. Shipbuilding. Marine engineering 1