Classification
548 - Crystallography
149
530 - Physics
125
620 - Engineering & allied operations
59
541 - Physical chemistry
53
539 - Modern physics
38
621 - Applied physics
31
549 - Mineralogy
30
546 - Inorganic chemistry
26
543 - Analytical chemistry
19
571 - Physiology & related subjects
13
547 - Organic chemistry
10
536 - Heat
6
512 - Algebra
5
537 - Electricity & electronics
5
572 - Biochemistry
5
551 - Geology, hydrology & meteorology
4
515 - Analysis
3
531 - Classical mechanics; solid mechanics
3
538 - Magnetism
3
516 - Geometry
2
610 - Medicine & health
2
616 - Diseases
2
660 - Chemical engineering
2
004 - Data processing & computer science
1
500 - Natural sciences & mathematics
1
501 - Philosophy & theory
1
514 - Topology
1
526 - Mathematical geography
1
535 - Light & infrared & ultraviolet phenomena
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1
629 - Other branches of engineering
1
641 - Food & drink
1
664 - Food technology
1
930 - History of ancient world to ca. 499
1