Classification
320 - Political science
330 - Economics
600 - Technology
630 - Agriculture & related technologies
363 - Other social problems & services
13
333 - Economics of land & energy
11
620 - Engineering & allied operations
11
700 - The arts; fine & decorative arts
11
370 - Education
8
000 - Computer science, information & general works
7
304 - Factors affecting social behavior
6
900 - History & geography
6
610 - Medicine & health
5
380 - Commerce, communications & transportation
4
551 - Geology, hydrology & meteorology
4
140 - Specific philosophical schools
3
300 - Social sciences
3
100 - Philosophy & psychology
2
340 - Law
2
580 - Plants (Botany)
2
170 - Ethics
1
200 - Religion
1
400 - Language
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
657 - Accounting
1
720 - Architecture
1
780 - Music
1