Classification
530 - Physics
66
621 - Applied physics
15
571 - Physiology & related subjects
14
535 - Light & infrared & ultraviolet phenomena
11
006 - Special computer methods
5
536 - Heat
5
541 - Physical chemistry
4
003 - Systems
3
515 - Analysis
3
500 - Natural sciences & mathematics
2
531 - Classical mechanics; solid mechanics
2
534 - Sound & related vibrations
2
616 - Diseases
2
001 - Knowledge
1
300 - Social sciences
1
330 - Economics
1
510 - Mathematics
1
511 - General principles of mathematics
1
519 - Probabilities & applied mathematics
1
537 - Electricity & electronics
1
550 - Earth sciences
1
572 - Biochemistry
1
629 - Other branches of engineering
1