Classification
300 - Social sciences
900 - History & geography
320 - Political science
78
100 - Philosophy & psychology
40
304 - Factors affecting social behavior
39
340 - Law
25
700 - The arts; fine & decorative arts
24
301 - Sociology & anthropology
19
600 - Technology
18
330 - Economics
15
140 - Specific philosophical schools
14
800 - Literature & rhetoric
13
380 - Commerce, communications & transportation
12
200 - Religion
11
620 - Engineering & allied operations
11
333 - Economics of land & energy
9
363 - Other social problems & services
9
370 - Education
9
720 - Architecture
9
576 - Genetics & evolution
8
610 - Medicine & health
8
791 - Public performances
7
170 - Ethics
6
780 - Music
5
410 - Linguistics
4
770 - Photography, photographs & computer art
4
361 - Social problems & social welfare in general
3
364 - Criminology
3
000 - Computer science, information & general works
2
360 - Social problems & services; associations
2
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
120 - Epistemology, causation & humankind
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
551 - Geology, hydrology & meteorology
1
658 - General management
1