Classification
330 - Economics
363 - Other social problems & services
370 - Education
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
333 - Economics of land & energy
6
620 - Engineering & allied operations
4
720 - Architecture
4
320 - Political science
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
400 - Language
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1