Classification
330 - Economics
363 - Other social problems & services
576 - Genetics & evolution
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
9
333 - Economics of land & energy
8
600 - Technology
8
380 - Commerce, communications & transportation
6
620 - Engineering & allied operations
5
140 - Specific philosophical schools
4
320 - Political science
4
658 - General management
4
304 - Factors affecting social behavior
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
900 - History & geography
3
370 - Education
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
657 - Accounting
1
800 - Literature & rhetoric
1