Classification
300 - Social sciences
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
900 - History & geography
140 - Specific philosophical schools
8
330 - Economics
5
363 - Other social problems & services
5
600 - Technology
5
620 - Engineering & allied operations
5
320 - Political science
4
340 - Law
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
370 - Education
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
720 - Architecture
3
800 - Literature & rhetoric
3
000 - Computer science, information & general works
2
170 - Ethics
2
200 - Religion
2
400 - Language
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
780 - Music
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
410 - Linguistics
1
581 - Specific topics in natural history
1
658 - General management
1