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