Classification
900 - History & geography
16
100 - Philosophy & psychology
13
370 - Education
12
140 - Specific philosophical schools
7
320 - Political science
5
610 - Medicine & health
5
800 - Literature & rhetoric
5
200 - Religion
4
300 - Social sciences
4
301 - Sociology & anthropology
4
333 - Economics of land & energy
4
170 - Ethics
3
330 - Economics
3
340 - Law
3
297 - Islam, Babism & Bahai Faith
2
380 - Commerce, communications & transportation
2
400 - Language
2
410 - Linguistics
2
600 - Technology
2
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
364 - Criminology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
658 - General management
1
700 - The arts; fine & decorative arts
1
791 - Public performances
1
880 - Hellenic literatures; classical Greek
1