TJ Mechanical engineering and machinery 106 QA Mathematics 77 TP Chemical technology 26 T Technology (General) 16 TA Engineering (General). Civil engineering (General) 12 TK Electrical engineering. Electronics Nuclear engineering 11 Q Science (General) 9 Q Science 7 QC Physics 5 QD Chemistry 5 Transmission. Heat transfer 4 Heat 3 Heat engines 3 LC5800-5808 Distance education 2 Modelling 2 QA1-939 Mathematics 2 Stirling cycle 2 TA1-2040 Engineering (General). Civil engineering (General) 2 TC Hydraulic engineering. Ocean engineering 2 TD Environmental technology. Sanitary engineering 2 TH Building construction 2 Thermal conductivity 2 Additive manufacturing 1 Aeronautics. Aeronautical engineering 1 Alloy casting 1 Anoxybacillus flavithermus 1 Architectural engineering. Structural engineering of buildings 1 Artificial Neural Network 1 Attachment 1 Automotive components 1