Classification
320 - Political science
330 - Economics
363 - Other social problems & services
900 - History & geography
333 - Economics of land & energy
23
700 - The arts; fine & decorative arts
23
600 - Technology
15
000 - Computer science, information & general works
14
380 - Commerce, communications & transportation
11
620 - Engineering & allied operations
11
300 - Social sciences
10
551 - Geology, hydrology & meteorology
9
370 - Education
8
581 - Specific topics in natural history
8
610 - Medicine & health
8
301 - Sociology & anthropology
7
140 - Specific philosophical schools
6
340 - Law
5
580 - Plants (Botany)
4
720 - Architecture
4
100 - Philosophy & psychology
3
200 - Religion
3
304 - Factors affecting social behavior
3
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
658 - General management
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
657 - Accounting
1
800 - Literature & rhetoric
1