Classification
370 - Education
600 - Technology
700 - The arts; fine & decorative arts
10
720 - Architecture
900 - History & geography
330 - Economics
6
363 - Other social problems & services
6
380 - Commerce, communications & transportation
6
620 - Engineering & allied operations
6
333 - Economics of land & energy
5
000 - Computer science, information & general works
4
320 - Political science
3
140 - Specific philosophical schools
2
400 - Language
2
530 - Physics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
658 - General management
2
100 - Philosophy & psychology
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
340 - Law
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1