TJ Mechanical engineering and machinery 108 TP Chemical technology 90 TA Engineering (General). Civil engineering (General) 62 QD Chemistry 36 QC Physics 31 TK Electrical engineering. Electronics Nuclear engineering 25 Composite materials 19 T Technology (General) 18 Q Science (General) 15 T1-995 Technology(General) 6 Machine design and drawing 5 Mechanics applied to machinery. Dynamics 5 NA Architecture 5 QA Mathematics 5 Materials of engineering and construction 4 R Medicine 4 TH Building construction 4 Unspecified 4 Additive manufacturing 3 Analytical chemistry 3 Atomic physics. Constitution and properties of matter 3 Descriptive and experimental mechanics 3 Electric resistance 3 Machine construction (General) 3 Malaysia 3 Materiality 3 Mechanics of engineering. Applied mechanics 3 Plastics 3 Polymers. Polymeric composites 3 3D printing 2