Classification
530 - Physics
69
539 - Modern physics
50
621 - Applied physics
41
620 - Engineering & allied operations
12
670 - Manufacturing
10
520 - Astronomy & allied sciences
8
531 - Classical mechanics; solid mechanics
6
543 - Analytical chemistry
6
629 - Other branches of engineering
6
519 - Probabilities & applied mathematics
5
523 - Specific celestial bodies & phenomena
5
551 - Geology, hydrology & meteorology
4
500 - Natural sciences & mathematics
3
571 - Physiology & related subjects
3
610 - Medicine & health
3
510 - Mathematics
2
526 - Mathematical geography
2
535 - Light & infrared & ultraviolet phenomena
2
537 - Electricity & electronics
2
538 - Magnetism
2
550 - Earth sciences
2
617 - Surgery & related medical specialties
2
624 - Civil engineering
2
340 - Law
1
363 - Other social problems & services
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
540 - Chemistry & allied sciences
1
541 - Physical chemistry
1
548 - Crystallography
1
577 - Ecology
1
616 - Diseases
1
630 - Agriculture & related technologies
1
660 - Chemical engineering
1
690 - Buildings
1