Classification
001 - Knowledge
1
003 - Systems
3
004 - Data processing & computer science
4
006 - Special computer methods
1
140 - Specific philosophical schools
1
170 - Ethics
1
174 - Occupational ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
6
306 - Culture & institutions
1
333 - Economics of land & energy
3
338 - Production
1
344 - Labor, social, education & cultural law
1
363 - Other social problems & services
2
500 - Natural sciences & mathematics
5
510 - Mathematics
1
515 - Analysis
2
520 - Astronomy & allied sciences
2
530 - Physics
13
531 - Classical mechanics; solid mechanics
1
536 - Heat
1
539 - Modern physics
1
540 - Chemistry & allied sciences
1
541 - Physical chemistry
3
543 - Analytical chemistry
11
546 - Inorganic chemistry
5
547 - Organic chemistry
18
551 - Geology, hydrology & meteorology
3
560 - Paleontology; paleozoology
2
570 - Life sciences; biology
74
571 - Physiology & related subjects
1,842
572 - Biochemistry
370
573 - Specific physiological systems in animals
4
576 - Genetics & evolution
20
577 - Ecology
15
579 - Microorganisms, fungi & algae
99
580 - Plants (Botany)
96
581 - Specific topics in natural history
11
590 - Animals (Zoology)
53
591 - Specific topics in natural history
3
592 - Invertebrates
2
595 - Arthropods
1
596 - Chordates
1
599 - Mammals
17
610 - Medicine & health
224
611 - Human anatomy, cytology & histology
53
612 - Human physiology
203
613 - Personal health & safety
5
614 - Incidence & prevention of disease
47
615 - Pharmacology & therapeutics
80
more ...