Classification
530 - Physics
400
520 - Astronomy & allied sciences
99
523 - Specific celestial bodies & phenomena
91
539 - Modern physics
37
535 - Light & infrared & ultraviolet phenomena
16
537 - Electricity & electronics
16
515 - Analysis
11
531 - Classical mechanics; solid mechanics
11
621 - Applied physics
10
500 - Natural sciences & mathematics
8
516 - Geometry
8
510 - Mathematics
7
536 - Heat
7
501 - Philosophy & theory
4
519 - Probabilities & applied mathematics
4
514 - Topology
3
629 - Other branches of engineering
3
512 - Algebra
2
541 - Physical chemistry
2
113 - Cosmology
1
400 - Language
1
511 - General principles of mathematics
1
526 - Mathematical geography
1
534 - Sound & related vibrations
1
550 - Earth sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
628 - Sanitary & municipal engineering
1
660 - Chemical engineering
1