Classification
610 - Medicine & health
219
571 - Physiology & related subjects
164
572 - Biochemistry
62
616 - Diseases
61
620 - Engineering & allied operations
27
621 - Applied physics
25
612 - Human physiology
23
539 - Modern physics
20
570 - Life sciences; biology
18
617 - Surgery & related medical specialties
18
615 - Pharmacology & therapeutics
12
530 - Physics
10
541 - Physical chemistry
8
660 - Chemical engineering
8
534 - Sound & related vibrations
7
543 - Analytical chemistry
7
573 - Specific physiological systems in animals
5
004 - Data processing & computer science
4
005 - Computer programming, programs & data
4
006 - Special computer methods
4
547 - Organic chemistry
4
580 - Plants (Botany)
4
531 - Classical mechanics; solid mechanics
3
550 - Earth sciences
3
577 - Ecology
3
611 - Human anatomy, cytology & histology
3
333 - Economics of land & energy
2
515 - Analysis
2
536 - Heat
2
537 - Electricity & electronics
2
538 - Magnetism
2
579 - Microorganisms, fungi & algae
2
590 - Animals (Zoology)
2
629 - Other branches of engineering
2
003 - Systems
1
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
501 - Philosophy & theory
1
502 - Miscellany
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
535 - Light & infrared & ultraviolet phenomena
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
more ...