Classification
370 - Education
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
620 - Engineering & allied operations
12
333 - Economics of land & energy
11
330 - Economics
9
363 - Other social problems & services
9
000 - Computer science, information & general works
6
720 - Architecture
6
320 - Political science
5
400 - Language
4
610 - Medicine & health
4
340 - Law
3
658 - General management
3
780 - Music
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
300 - Social sciences
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
200 - Religion
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1