TJ Mechanical engineering and machinery 410 Mechanics applied to machinery. Dynamics 39 Machine design and drawing 36 Machine construction (General) 19 Engineering machinery, tools, and implements 12 Aeronautics. Aeronautical engineering 11 Finite element method 11 Mechanical movements 9 Engineering mathematics. Engineering analysis 8 Materials of engineering and construction 8 Composite materials 7 Heat engines 7 Mechanical and electrical engineering combined 7 Metal manufactures. Metalworking 6 Miscellaneous motors and engines.Including gas, gasoline, diesel engines 6 Biotechnology 5 Mechanics of engineering. Applied mechanics 5 Power resources 5 Algorithms 4 Control engineering systems. Automatic machinery (General) 4 Energy conservation 4 Hydraulic machinery 4 Machinery exclusive of prime movers 4 Mechanics of flight: Aerodynamics 4 Product engineering 4 Structural engineering 4 Welding 4 Biodiesel fuels 3 Fuel 3 Machine shops and machine shop practice 3