TA Engineering (General). Civil engineering (General) 170 TD Environmental technology. Sanitary engineering 112 TJ Mechanical engineering and machinery 58 TK Electrical engineering. Electronics Nuclear engineering 57 GE Environmental Sciences 14 TP Chemical technology 9 HD28 Management. Industrial Management 7 TC Hydraulic engineering. Ocean engineering 6 TH Building construction 5 HD Industries. Land use. Labor 4 T Technology (General) 4 TE Highway engineering. Roads and pavements 4 VM Naval architecture. Shipbuilding. Marine engineering 4 QA76 Computer software 3 QD Chemistry 3 GV Recreation Leisure 2 HE Transportation and Communications 2 K Law (General) 2 Q Science (General) 2 QE Geology 2 Unspecified 2 Aerodynamics 1 Ambient intelligence 1 BIM interoperability 1 Biomolecule immobilisation 1 Bioprinting 1 Business 1 Characterisation 1 Chemical engineering 1 Comparative 1