Classification
301 - Sociology & anthropology
330 - Economics
610 - Medicine & health
300 - Social sciences
6
333 - Economics of land & energy
5
363 - Other social problems & services
5
140 - Specific philosophical schools
4
200 - Religion
3
340 - Law
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
100 - Philosophy & psychology
2
320 - Political science
2
620 - Engineering & allied operations
2
900 - History & geography
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1