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