TP Chemical technology 85 TK Electrical engineering. Electronics Nuclear engineering 61 TJ Mechanical engineering and machinery 52 TA Engineering (General). Civil engineering (General) 41 QD Chemistry 31 T Technology (General) 12 QA75 Electronic computers. Computer science 9 Q Science (General) 7 Performance 5 Power 5 QH Natural history 5 Strength and conditioning 5 TD Environmental technology. Sanitary engineering 5 TH Building construction 5 Unspecified 5 Force 4 QA Mathematics 4 TS Manufactures 4 Velocity 4 Caffeine 3 Netball 3 QE Geology 3 Acceleration 2 Computational fluid dynamics 2 Cricket 2 Cryopreservation 2 Cycling 2 Deep learning 2 Diagnosis 2 Elite athletes 2