Classification
000 - Computer science, information & general works
363 - Other social problems & services
333 - Economics of land & energy
9
700 - The arts; fine & decorative arts
9
900 - History & geography
9
330 - Economics
7
320 - Political science
6
600 - Technology
5
620 - Engineering & allied operations
4
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
400 - Language
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
200 - Religion
2
300 - Social sciences
2
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
370 - Education
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
590 - Animals (Zoology)
1
610 - Medicine & health
1
780 - Music
1
791 - Public performances
1