Classification
530 - Physics
104
539 - Modern physics
71
616 - Diseases
43
621 - Applied physics
38
500 - Natural sciences & mathematics
34
520 - Astronomy & allied sciences
18
541 - Physical chemistry
14
620 - Engineering & allied operations
12
571 - Physiology & related subjects
9
546 - Inorganic chemistry
7
001 - Knowledge
5
300 - Social sciences
5
543 - Analytical chemistry
5
150 - Psychology
3
548 - Crystallography
3
531 - Classical mechanics; solid mechanics
2
576 - Genetics & evolution
2
577 - Ecology
2
612 - Human physiology
2
512 - Algebra
1
515 - Analysis
1
536 - Heat
1
538 - Magnetism
1
570 - Life sciences; biology
1
572 - Biochemistry
1
580 - Plants (Botany)
1
610 - Medicine & health
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
660 - Chemical engineering
1