Classification
320 - Political science
370 - Education
380 - Commerce, communications & transportation
600 - Technology
330 - Economics
12
333 - Economics of land & energy
10
700 - The arts; fine & decorative arts
10
363 - Other social problems & services
8
000 - Computer science, information & general works
7
610 - Medicine & health
7
900 - History & geography
7
300 - Social sciences
6
620 - Engineering & allied operations
5
100 - Philosophy & psychology
4
551 - Geology, hydrology & meteorology
4
720 - Architecture
4
140 - Specific philosophical schools
3
400 - Language
3
500 - Natural sciences & mathematics
3
658 - General management
3
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
2
780 - Music
2
170 - Ethics
1
200 - Religion
1
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1