Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
21
700 - The arts; fine & decorative arts
21
333 - Economics of land & energy
18
363 - Other social problems & services
13
551 - Geology, hydrology & meteorology
12
380 - Commerce, communications & transportation
8
600 - Technology
8
140 - Specific philosophical schools
7
370 - Education
7
610 - Medicine & health
6
581 - Specific topics in natural history
5
900 - History & geography
4
304 - Factors affecting social behavior
3
576 - Genetics & evolution
3
658 - General management
3
300 - Social sciences
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
720 - Architecture
2
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1
791 - Public performances
1
800 - Literature & rhetoric
1