Classification
539 - Modern physics
110
530 - Physics
27
541 - Physical chemistry
15
621 - Applied physics
8
620 - Engineering & allied operations
6
531 - Classical mechanics; solid mechanics
5
535 - Light & infrared & ultraviolet phenomena
3
537 - Electricity & electronics
3
333 - Economics of land & energy
2
523 - Specific celestial bodies & phenomena
2
534 - Sound & related vibrations
2
536 - Heat
2
516 - Geometry
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
546 - Inorganic chemistry
1
547 - Organic chemistry
1
549 - Mineralogy
1
571 - Physiology & related subjects
1
900 - History & geography
1