Classification
900 - History & geography
92
320 - Political science
49
140 - Specific philosophical schools
21
700 - The arts; fine & decorative arts
20
800 - Literature & rhetoric
16
340 - Law
13
300 - Social sciences
11
330 - Economics
10
400 - Language
8
576 - Genetics & evolution
7
100 - Philosophy & psychology
6
170 - Ethics
5
333 - Economics of land & energy
5
610 - Medicine & health
5
297 - Islam, Babism & Bahai Faith
4
301 - Sociology & anthropology
4
410 - Linguistics
4
600 - Technology
4
000 - Computer science, information & general works
3
200 - Religion
3
304 - Factors affecting social behavior
3
370 - Education
3
380 - Commerce, communications & transportation
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
363 - Other social problems & services
2
791 - Public performances
2
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
720 - Architecture
1
770 - Photography, photographs & computer art
1