Classification
320 - Political science
330 - Economics
900 - History & geography
333 - Economics of land & energy
16
700 - The arts; fine & decorative arts
15
000 - Computer science, information & general works
11
363 - Other social problems & services
11
600 - Technology
9
300 - Social sciences
8
370 - Education
8
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
620 - Engineering & allied operations
7
200 - Religion
5
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
301 - Sociology & anthropology
3
610 - Medicine & health
3
720 - Architecture
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
340 - Law
2
630 - Agriculture & related technologies
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
658 - General management
1