Classification
300 - Social sciences
330 - Economics
363 - Other social problems & services
320 - Political science
31
333 - Economics of land & energy
25
700 - The arts; fine & decorative arts
21
600 - Technology
19
900 - History & geography
15
140 - Specific philosophical schools
14
301 - Sociology & anthropology
12
551 - Geology, hydrology & meteorology
12
000 - Computer science, information & general works
9
380 - Commerce, communications & transportation
9
610 - Medicine & health
9
620 - Engineering & allied operations
9
581 - Specific topics in natural history
8
100 - Philosophy & psychology
7
340 - Law
7
370 - Education
7
630 - Agriculture & related technologies
6
200 - Religion
5
170 - Ethics
4
304 - Factors affecting social behavior
3
400 - Language
3
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
350 - Public administration & military science
2
658 - General management
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
302 - Social interaction
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1
720 - Architecture
1