HD Industries. Land use. Labor TJ Mechanical engineering and machinery 6 K Law (General) 2 QA76 Computer software 2 TA Engineering (General). Civil engineering (General) 2 Classes of labor, Including women, children, students, middle-aged and older persons, minorities 1 Construction industry 1 Food industry and trade. Halal food industry. Certification 1 G Geography (General) 1 H Social Sciences (General) 1 HB Economic Theory 1 HD28 Management. Industrial Management 1 JS Local government Municipal government 1 Labor. Work. Working class 1 Malaysia 1 Methodology 1 Research 1 TC Hydraulic engineering. Ocean engineering 1 TH Building construction 1 TR Photography 1