Classification
700 - The arts; fine & decorative arts
155
600 - Technology
153
000 - Computer science, information & general works
126
620 - Engineering & allied operations
120
900 - History & geography
106
333 - Economics of land & energy
105
363 - Other social problems & services
56
330 - Economics
54
380 - Commerce, communications & transportation
42
500 - Natural sciences & mathematics
39
576 - Genetics & evolution
35
610 - Medicine & health
33
580 - Plants (Botany)
29
551 - Geology, hydrology & meteorology
27
140 - Specific philosophical schools
24
540 - Chemistry & allied sciences
23
340 - Law
22
320 - Political science
18
530 - Physics
17
800 - Literature & rhetoric
16
414 - Phonology & phonetics
15
630 - Agriculture & related technologies
14
720 - Architecture
10
581 - Specific topics in natural history
7
370 - Education
6
304 - Factors affecting social behavior
5
400 - Language
5
658 - General management
4
100 - Philosophy & psychology
3
170 - Ethics
3
300 - Social sciences
3
410 - Linguistics
3
550 - Earth sciences
3
612 - Human physiology
3
200 - Religion
2
361 - Social problems & social welfare in general
2
510 - Mathematics
2
511 - General principles of mathematics
2
512 - Algebra
2
650 - Management & auxiliary services
2
301 - Sociology & anthropology
1
507 - Education, research & related topics
1
514 - Topology
1
515 - Analysis
1
516 - Geometry
1
518 - Numerical analysis
1
574 - [Unassigned]
1
621 - Applied physics
1
657 - Accounting
1
664 - Food technology
1
more ...