Classification
530 - Physics
83
620 - Engineering & allied operations
55
538 - Magnetism
20
621 - Applied physics
18
548 - Crystallography
11
536 - Heat
7
537 - Electricity & electronics
7
539 - Modern physics
5
543 - Analytical chemistry
3
500 - Natural sciences & mathematics
2
531 - Classical mechanics; solid mechanics
2
534 - Sound & related vibrations
1
535 - Light & infrared & ultraviolet phenomena
1
541 - Physical chemistry
1