Classification
530 - Physics
82
620 - Engineering & allied operations
53
621 - Applied physics
27
629 - Other branches of engineering
12
541 - Physical chemistry
11
536 - Heat
6
539 - Modern physics
6
531 - Classical mechanics; solid mechanics
5
003 - Systems
4
537 - Electricity & electronics
4
500 - Natural sciences & mathematics
3
543 - Analytical chemistry
3
520 - Astronomy & allied sciences
2
540 - Chemistry & allied sciences
2
670 - Manufacturing
2
542 - Techniques, equipment & materials
1
548 - Crystallography
1
571 - Physiology & related subjects
1
610 - Medicine & health
1
611 - Human anatomy, cytology & histology
1
616 - Diseases
1
624 - Civil engineering
1
690 - Buildings
1