Classification
200 - Religion
301 - Sociology & anthropology
300 - Social sciences
34
900 - History & geography
32
320 - Political science
22
100 - Philosophy & psychology
18
700 - The arts; fine & decorative arts
15
140 - Specific philosophical schools
13
610 - Medicine & health
12
297 - Islam, Babism & Bahai Faith
9
380 - Commerce, communications & transportation
9
370 - Education
8
170 - Ethics
7
330 - Economics
7
340 - Law
7
600 - Technology
7
400 - Language
6
000 - Computer science, information & general works
5
363 - Other social problems & services
5
780 - Music
5
333 - Economics of land & energy
4
398 - Folklore
4
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
2
410 - Linguistics
2
530 - Physics
2
620 - Engineering & allied operations
2
800 - Literature & rhetoric
2
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1