Classification
320 - Political science
900 - History & geography
330 - Economics
29
700 - The arts; fine & decorative arts
27
300 - Social sciences
25
100 - Philosophy & psychology
23
200 - Religion
19
800 - Literature & rhetoric
19
340 - Law
18
301 - Sociology & anthropology
16
140 - Specific philosophical schools
14
380 - Commerce, communications & transportation
10
576 - Genetics & evolution
10
333 - Economics of land & energy
8
370 - Education
8
350 - Public administration & military science
7
400 - Language
7
297 - Islam, Babism & Bahai Faith
6
304 - Factors affecting social behavior
6
610 - Medicine & health
5
363 - Other social problems & services
4
364 - Criminology
4
600 - Technology
4
780 - Music
4
000 - Computer science, information & general works
3
296 - Judaism
3
410 - Linguistics
3
630 - Agriculture & related technologies
3
770 - Photography, photographs & computer art
3
791 - Public performances
3
170 - Ethics
2
361 - Social problems & social welfare in general
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
398 - Folklore
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1