Classification
301 - Sociology & anthropology
600 - Technology
300 - Social sciences
44
700 - The arts; fine & decorative arts
23
900 - History & geography
18
330 - Economics
15
200 - Religion
14
320 - Political science
14
620 - Engineering & allied operations
14
140 - Specific philosophical schools
13
100 - Philosophy & psychology
12
363 - Other social problems & services
11
000 - Computer science, information & general works
10
610 - Medicine & health
9
370 - Education
8
380 - Commerce, communications & transportation
8
333 - Economics of land & energy
7
630 - Agriculture & related technologies
7
340 - Law
6
576 - Genetics & evolution
6
170 - Ethics
4
400 - Language
4
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
530 - Physics
2
540 - Chemistry & allied sciences
2
780 - Music
2
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
364 - Criminology
1
551 - Geology, hydrology & meteorology
1
720 - Architecture
1
800 - Literature & rhetoric
1