Machine design and drawing TJ Mechanical engineering and machinery 28 Machine construction (General) 12 Mechanics applied to machinery. Dynamics 7 Aeronautics. Aeronautical engineering 3 Control engineering systems. Automatic machinery (General) 2 Hydraulic machinery 2 Machine shops and machine shop practice 2 Power resources 2 Agricultural machinery. Farm machinery 1 Consumer behavior. Consumers' preferences. Consumer research. Including consumer profiling 1 Energy conservation 1 Machinery exclusive of prime movers 1 Materials of engineering and construction 1 Mechanical and electrical engineering combined 1 Mechanical movements 1 Metal manufactures. Metalworking 1 Product engineering 1 Transmission. Heat transfer 1