Classification
300 - Social sciences
330 - Economics
700 - The arts; fine & decorative arts
900 - History & geography
320 - Political science
13
100 - Philosophy & psychology
12
600 - Technology
10
140 - Specific philosophical schools
8
301 - Sociology & anthropology
8
363 - Other social problems & services
8
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
333 - Economics of land & energy
7
370 - Education
6
400 - Language
6
780 - Music
6
340 - Law
5
380 - Commerce, communications & transportation
5
410 - Linguistics
5
720 - Architecture
5
200 - Religion
4
630 - Agriculture & related technologies
4
800 - Literature & rhetoric
4
304 - Factors affecting social behavior
3
530 - Physics
3
610 - Medicine & health
3
658 - General management
3
770 - Photography, photographs & computer art
3
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1