Classification
320 - Political science
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
333 - Economics of land & energy
20
000 - Computer science, information & general works
14
551 - Geology, hydrology & meteorology
9
600 - Technology
9
900 - History & geography
9
370 - Education
8
140 - Specific philosophical schools
7
610 - Medicine & health
7
720 - Architecture
5
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
414 - Phonology & phonetics
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
300 - Social sciences
2
340 - Law
2
580 - Plants (Botany)
2
657 - Accounting
2
658 - General management
2
200 - Religion
1
301 - Sociology & anthropology
1
410 - Linguistics
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1