Classification
570 - Life sciences; biology
323
610 - Medicine & health
291
616 - Diseases
43
614 - Incidence & prevention of disease
32
571 - Physiology & related subjects
28
572 - Biochemistry
27
611 - Human anatomy, cytology & histology
24
599 - Mammals
19
615 - Pharmacology & therapeutics
16
540 - Chemistry & allied sciences
14
580 - Plants (Botany)
13
612 - Human physiology
13
617 - Surgery & related medical specialties
11
590 - Animals (Zoology)
9
620 - Engineering & allied operations
9
660 - Chemical engineering
8
344 - Labor, social, education & cultural law
7
577 - Ecology
6
579 - Microorganisms, fungi & algae
6
551 - Geology, hydrology & meteorology
4
613 - Personal health & safety
4
621 - Applied physics
4
630 - Agriculture & related technologies
4
507 - Education, research & related topics
3
519 - Probabilities & applied mathematics
3
541 - Physical chemistry
3
547 - Organic chemistry
3
003 - Systems
2
110 - Metaphysics
2
301 - Sociology & anthropology
2
306 - Culture & institutions
2
343 - Military, tax, trade & industrial law
2
520 - Astronomy & allied sciences
2
530 - Physics
2
576 - Genetics & evolution
2
591 - Specific topics in natural history
2
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
004 - Data processing & computer science
1
120 - Epistemology, causation & humankind
1
128 - Humankind
1
153 - Mental processes & intelligence
1
158 - Applied psychology
1
170 - Ethics
1
330 - Economics
1
333 - Economics of land & energy
1
338 - Production
1
346 - Private law
1
353 - Specific fields of public administration
1
370 - Education
1
500 - Natural sciences & mathematics
1
more ...