TJ Mechanical engineering and machinery 2,036 TA Engineering (General). Civil engineering (General) 290 TK Electrical engineering. Electronics Nuclear engineering 205 human 51 T Technology (General) 50 TP Chemical technology 48 TS Manufactures 45 Mechanics applied to machinery. Dynamics 43 Humans 40 Machine design and drawing 39 Mechanical engineering & materials 38 Finite element method 35 Article 26 Machine construction (General) 23 VM Naval architecture. Shipbuilding. Marine engineering 23 Mechanical engineering 22 Deep learning 20 Degrees of freedom (mechanics) 20 Mechanical properties 19 TD Environmental technology. Sanitary engineering 19 TJ1-1570 Mechanical engineering and machinery 19 Forecasting 16 TL Motor vehicles. Aeronautics. Astronautics 16 machine learning 16 QA75 Electronic computers. Computer science 15 Tensile strength 15 algorithm 15 Biomechanics 14 Deformation 14 Failure (mechanical) 14