Classification
320 - Political science
333 - Economics of land & energy
17
700 - The arts; fine & decorative arts
17
300 - Social sciences
16
140 - Specific philosophical schools
15
330 - Economics
14
900 - History & geography
12
100 - Philosophy & psychology
9
370 - Education
9
170 - Ethics
8
200 - Religion
8
304 - Factors affecting social behavior
8
340 - Law
7
380 - Commerce, communications & transportation
6
610 - Medicine & health
6
364 - Criminology
5
800 - Literature & rhetoric
5
000 - Computer science, information & general works
4
297 - Islam, Babism & Bahai Faith
4
301 - Sociology & anthropology
4
361 - Social problems & social welfare in general
4
363 - Other social problems & services
4
410 - Linguistics
4
400 - Language
3
780 - Music
3
323 - Civil & political rights
2
360 - Social problems & services; associations
2
600 - Technology
2
120 - Epistemology, causation & humankind
1
296 - Judaism
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
658 - General management
1
720 - Architecture
1
770 - Photography, photographs & computer art
1