Classification
330 - Economics
333 - Economics of land & energy
363 - Other social problems & services
34
320 - Political science
31
700 - The arts; fine & decorative arts
29
140 - Specific philosophical schools
24
000 - Computer science, information & general works
18
300 - Social sciences
13
630 - Agriculture & related technologies
12
551 - Geology, hydrology & meteorology
10
600 - Technology
10
900 - History & geography
7
301 - Sociology & anthropology
6
304 - Factors affecting social behavior
6
340 - Law
6
380 - Commerce, communications & transportation
6
610 - Medicine & health
6
620 - Engineering & allied operations
6
581 - Specific topics in natural history
5
100 - Philosophy & psychology
3
170 - Ethics
2
200 - Religion
2
370 - Education
2
400 - Language
2
410 - Linguistics
2
414 - Phonology & phonetics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
657 - Accounting
2
658 - General management
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
540 - Chemistry & allied sciences
1
720 - Architecture
1
780 - Music
1
800 - Literature & rhetoric
1