Classification
530 - Physics
116
500 - Natural sciences & mathematics
49
539 - Modern physics
41
620 - Engineering & allied operations
38
509 - Historical, geographic & persons treatment
18
621 - Applied physics
17
001 - Knowledge
12
300 - Social sciences
12
537 - Electricity & electronics
5
538 - Magnetism
5
520 - Astronomy & allied sciences
3
535 - Light & infrared & ultraviolet phenomena
3
536 - Heat
3
548 - Crystallography
3
541 - Physical chemistry
2
519 - Probabilities & applied mathematics
1
531 - Classical mechanics; solid mechanics
1
534 - Sound & related vibrations
1
543 - Analytical chemistry
1