TP Chemical technology 17 TK Electrical engineering. Electronics Nuclear engineering 15 T Technology (General) 14 TJ Mechanical engineering and machinery 11 Q Science (General) 4 TA Engineering (General). Civil engineering (General) 4 QA75 Electronic computers. Computer science 3 TC Hydraulic engineering. Ocean engineering 3 Analysis 2 Bacteria 2 Biotechnology 2 Growth 2 Malaysia 2 QD Chemistry 2 QH301 Biology 2 Acids 1 Agricultural conservation 1 Algal biotechnology 1 Analytical chemistry 1 Animal feeds and feed mills. Pet food industry 1 Animation (Cinematography) 1 Anti-inflammatory agents (General or not elsewhere classified) 1 Antibacterial agents 1 Applications of electronics 1 Architectural drawing and design 1 Architecture in relation to special subjects 1 Botanical chemistry. Phytochemicals 1 Chemical engineering 1 Creative ability in technology 1 Data processing 1