Classification
000 - Computer science, information & general works
10
003 - Systems
2
006 - Special computer methods
3
061 - Organizations in North America
9
140 - Specific philosophical schools
8
150 - Psychology
3
152 - Perception, movement, emotions & drives
1
170 - Ethics
4
174 - Occupational ethics
7
201 - Religious mythology & social theology
1
300 - Social sciences
4
301 - Sociology & anthropology
7
304 - Factors affecting social behavior
1
320 - Political science
1
333 - Economics of land & energy
2
337 - International economics
1
340 - Law
5
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
6
360 - Social problems & services; associations
1
363 - Other social problems & services
1
370 - Education
1
417 - Dialectology & historical linguistics
1
500 - Natural sciences & mathematics
57
501 - Philosophy & theory
1
509 - Historical, geographic & persons treatment
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
5
543 - Analytical chemistry
3
547 - Organic chemistry
2
570 - Life sciences; biology
120
571 - Physiology & related subjects
187
572 - Biochemistry
127
576 - Genetics & evolution
44
577 - Ecology
7
579 - Microorganisms, fungi & algae
16
580 - Plants (Botany)
25
581 - Specific topics in natural history
3
590 - Animals (Zoology)
2
592 - Invertebrates
2
599 - Mammals
9
600 - Technology
1
610 - Medicine & health
106
611 - Human anatomy, cytology & histology
22
612 - Human physiology
69
613 - Personal health & safety
10
614 - Incidence & prevention of disease
3
615 - Pharmacology & therapeutics
34
616 - Diseases
681
617 - Surgery & related medical specialties
19
more ...