Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
16
000 - Computer science, information & general works
9
363 - Other social problems & services
9
900 - History & geography
9
370 - Education
8
620 - Engineering & allied operations
7
551 - Geology, hydrology & meteorology
5
610 - Medicine & health
5
140 - Specific philosophical schools
4
576 - Genetics & evolution
4
658 - General management
4
720 - Architecture
4
300 - Social sciences
3
630 - Agriculture & related technologies
3
657 - Accounting
3
100 - Philosophy & psychology
2
304 - Factors affecting social behavior
2
400 - Language
2
780 - Music
2
800 - Literature & rhetoric
2
200 - Religion
1
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1