TJ Mechanical engineering and machinery Mechanical and electrical engineering combined 7 Algorithms 1 Bioengineering 1 Electricity and magnetism 1 Engineering machinery, tools, and implements 1 Heat engines 1 Machine design and drawing 1 Mechanical devices and figures. Automata. Ingenious mechanisms.Robots (General) 1 Mechanics applied to machinery. Dynamics 1 Metal manufactures. Metalworking 1 Microfluidics and microfluidic devices 1 Miscellaneous motors and engines.Including gas, gasoline, diesel engines 1 Processes, operations, and techniques 1 Production of electric energy or power. Powerplants. Central stations 1 Robotics. Robots. Manipulators (Mechanism) 1 Structural engineering 1 Systems engineering 1