Classification
320 - Political science
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
700 - The arts; fine & decorative arts
900 - History & geography
000 - Computer science, information & general works
9
600 - Technology
8
380 - Commerce, communications & transportation
7
370 - Education
6
620 - Engineering & allied operations
6
301 - Sociology & anthropology
4
551 - Geology, hydrology & meteorology
4
140 - Specific philosophical schools
3
300 - Social sciences
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
720 - Architecture
3
340 - Law
2
580 - Plants (Botany)
2
658 - General management
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1