Classification
140 - Specific philosophical schools
330 - Economics
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
12
610 - Medicine & health
8
363 - Other social problems & services
7
380 - Commerce, communications & transportation
6
600 - Technology
6
000 - Computer science, information & general works
5
304 - Factors affecting social behavior
5
320 - Political science
5
333 - Economics of land & energy
5
551 - Geology, hydrology & meteorology
4
620 - Engineering & allied operations
3
900 - History & geography
3
100 - Philosophy & psychology
2
370 - Education
2
400 - Language
2
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
336 - Public finance
1
340 - Law
1
361 - Social problems & social welfare in general
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
658 - General management
1
720 - Architecture
1