TJ Mechanical engineering and machinery 18 Business cycles. Economic fluctuations. Economic indicators 17 Malaysia 14 Finance and cycles. Financial crises. Convergence (Economics) 11 Motor vehicles. Cycles 7 Economics 4 Financial management. Business finance. Corporation finance 4 Learning. Learning strategies 4 Algorithms 3 Application software 3 Computer software 3 Consumers. Consumer demand. Consumption 3 Educational technology 3 Environmental policy and economic development. Sustainable development. Environmental management 3 TL Motor vehicles. Aeronautics. Astronautics 3 Wireless communication systems. Mobile communication systems. Access control 3 Applications of electronics 2 Composite materials 2 Computers in education. Information technology 2 Database management 2 Detectors. Sensors. Sensor networks 2 Electric apparatus and materials. Electric circuits. Electric networks 2 Electricity and magnetism 2 Electronic mail systems. General works. Text messages (Cell phone systems) 2 Engineering meteorology 2 Environmental effects of industries and plants 2 Environmental pollution 2 Income. Income distribution. National income. Including gross national product, gross domestic product, and gross state product 2 Information technology. Information systems 2 Mechanics of engineering. Applied mechanics 2