Classification
000 - Computer science, information & general works
25
001 - Knowledge
3
003 - Systems
25
004 - Data processing & computer science
109
005 - Computer programming, programs & data
39
006 - Special computer methods
224
025 - Library operations
8
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
4
170 - Ethics
1
300 - Social sciences
3
303 - Social processes
1
304 - Factors affecting social behavior
1
330 - Economics
4
331 - Labor economics
1
332 - Financial economics
2
333 - Economics of land & energy
14
363 - Other social problems & services
10
370 - Education
1
380 - Commerce, communications & transportation
7
400 - Language
1
500 - Natural sciences & mathematics
26
510 - Mathematics
1
511 - General principles of mathematics
3
515 - Analysis
11
518 - Numerical analysis
18
519 - Probabilities & applied mathematics
16
530 - Physics
18
535 - Light & infrared & ultraviolet phenomena
5
540 - Chemistry & allied sciences
3
541 - Physical chemistry
15
542 - Techniques, equipment & materials
4
543 - Analytical chemistry
2
547 - Organic chemistry
4
548 - Crystallography
1
550 - Earth sciences
6
551 - Geology, hydrology & meteorology
2
560 - Paleontology; paleozoology
8
570 - Life sciences; biology
429
571 - Physiology & related subjects
58
572 - Biochemistry
63
574 - [Unassigned]
1
576 - Genetics & evolution
20
577 - Ecology
10
578 - Natural history of organisms
1
579 - Microorganisms, fungi & algae
14
580 - Plants (Botany)
19
581 - Specific topics in natural history
10
590 - Animals (Zoology)
4
more ...