TJ Mechanical engineering and machinery 66 Production of electric energy or power. Powerplants. Central stations 11 Devices for production of electricity by direct energy conversion 10 Applications of electric power 9 Energy conservation 9 Electric apparatus and materials. Electric circuits. Electric networks 8 Energy consumption 8 Malaysia 8 Production of electricity by direct energy conversion 8 Machine design and drawing 7 Power resources 7 Research 6 Algorithms 5 Electric power distribution. Electric power transmission 5 Mechanics applied to machinery. Dynamics 5 Renewable energy sources 5 Analytical chemistry 4 Composite materials 4 Detectors. Sensors. Sensor networks 4 Electricity 4 Electrolytes, electrolyte solutions 4 Electronics 4 Force and energy 4 Heat engines 4 Heat. Heat in its applications, as a source of power, etc 4 Inorganic chemistry 4 Machine construction (General) 4 NA Architecture 4 Physical and theoretical chemistry 4 Solar batteries. Solar cells 4