Classification
539 - Modern physics
178
700 - The arts; fine & decorative arts
89
530 - Physics
86
600 - Technology
78
620 - Engineering & allied operations
64
900 - History & geography
56
333 - Economics of land & energy
54
000 - Computer science, information & general works
43
610 - Medicine & health
34
140 - Specific philosophical schools
20
363 - Other social problems & services
20
500 - Natural sciences & mathematics
15
580 - Plants (Botany)
15
330 - Economics
14
380 - Commerce, communications & transportation
14
523 - Specific celestial bodies & phenomena
13
540 - Chemistry & allied sciences
11
576 - Genetics & evolution
11
621 - Applied physics
11
800 - Literature & rhetoric
10
340 - Law
8
537 - Electricity & electronics
7
551 - Geology, hydrology & meteorology
7
630 - Agriculture & related technologies
7
720 - Architecture
7
520 - Astronomy & allied sciences
6
300 - Social sciences
4
414 - Phonology & phonetics
4
370 - Education
3
581 - Specific topics in natural history
3
004 - Data processing & computer science
2
100 - Philosophy & psychology
2
170 - Ethics
2
304 - Factors affecting social behavior
2
320 - Political science
2
548 - Crystallography
2
550 - Earth sciences
2
571 - Physiology & related subjects
2
612 - Human physiology
2
615 - Pharmacology & therapeutics
2
930 - History of ancient world to ca. 499
2
003 - Systems
1
200 - Religion
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
400 - Language
1
515 - Analysis
1
526 - Mathematical geography
1
531 - Classical mechanics; solid mechanics
1
535 - Light & infrared & ultraviolet phenomena
1
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