Classification
304 - Factors affecting social behavior
320 - Political science
30
300 - Social sciences
27
700 - The arts; fine & decorative arts
27
900 - History & geography
23
800 - Literature & rhetoric
18
330 - Economics
15
340 - Law
15
140 - Specific philosophical schools
13
400 - Language
11
363 - Other social problems & services
9
301 - Sociology & anthropology
8
100 - Philosophy & psychology
7
200 - Religion
7
370 - Education
7
333 - Economics of land & energy
6
610 - Medicine & health
6
380 - Commerce, communications & transportation
5
410 - Linguistics
5
780 - Music
5
170 - Ethics
4
000 - Computer science, information & general works
3
361 - Social problems & social welfare in general
3
576 - Genetics & evolution
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
770 - Photography, photographs & computer art
2
398 - Folklore
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
670 - Manufacturing
1
720 - Architecture
1