Classification
000 - Computer science, information & general works
7
001 - Knowledge
4
004 - Data processing & computer science
2
006 - Special computer methods
1
100 - Philosophy & psychology
2
140 - Specific philosophical schools
3
155 - Differential & developmental psychology
1
170 - Ethics
1
174 - Occupational ethics
1
200 - Religion
1
220 - Bible
1
300 - Social sciences
7
301 - Sociology & anthropology
15
304 - Factors affecting social behavior
2
320 - Political science
3
330 - Economics
4
333 - Economics of land & energy
11
338 - Production
1
363 - Other social problems & services
6
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
3
501 - Philosophy & theory
1
509 - Historical, geographic & persons treatment
2
519 - Probabilities & applied mathematics
1
520 - Astronomy & allied sciences
2
523 - Specific celestial bodies & phenomena
2
530 - Physics
1
540 - Chemistry & allied sciences
2
541 - Physical chemistry
2
543 - Analytical chemistry
1
549 - Mineralogy
2
550 - Earth sciences
29
551 - Geology, hydrology & meteorology
92
553 - Economic geology
3
559 - Earth sciences of other areas
1
560 - Paleontology; paleozoology
151
561 - Paleobotany; fossil microorganisms
1
567 - Fossil cold-blooded vertebrates; fossil fishes
1
570 - Life sciences; biology
10
571 - Physiology & related subjects
16
572 - Biochemistry
4
576 - Genetics & evolution
61
577 - Ecology
17
578 - Natural history of organisms
11
580 - Plants (Botany)
6
581 - Specific topics in natural history
7
590 - Animals (Zoology)
21
591 - Specific topics in natural history
4
592 - Invertebrates
2
593 - Marine & seashore invertebrates
1
more ...