Classification
361 - Social problems & social welfare in general
600 - Technology
000 - Computer science, information & general works
15
620 - Engineering & allied operations
13
700 - The arts; fine & decorative arts
12
140 - Specific philosophical schools
11
610 - Medicine & health
9
320 - Political science
8
363 - Other social problems & services
8
330 - Economics
7
380 - Commerce, communications & transportation
7
630 - Agriculture & related technologies
7
333 - Economics of land & energy
6
170 - Ethics
5
360 - Social problems & services; associations
5
580 - Plants (Botany)
5
900 - History & geography
5
200 - Religion
4
581 - Specific topics in natural history
3
658 - General management
3
300 - Social sciences
2
301 - Sociology & anthropology
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
336 - Public finance
1
340 - Law
1
350 - Public administration & military science
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
612 - Human physiology
1
660 - Chemical engineering
1
800 - Literature & rhetoric
1