Classification
140 - Specific philosophical schools
320 - Political science
600 - Technology
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
13
620 - Engineering & allied operations
13
330 - Economics
12
363 - Other social problems & services
12
380 - Commerce, communications & transportation
11
900 - History & geography
11
333 - Economics of land & energy
10
340 - Law
7
576 - Genetics & evolution
6
720 - Architecture
6
551 - Geology, hydrology & meteorology
5
610 - Medicine & health
5
200 - Religion
4
300 - Social sciences
4
361 - Social problems & social welfare in general
4
301 - Sociology & anthropology
3
304 - Factors affecting social behavior
3
370 - Education
3
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
100 - Philosophy & psychology
2
170 - Ethics
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
658 - General management
2
297 - Islam, Babism & Bahai Faith
1
364 - Criminology
1
657 - Accounting
1
800 - Literature & rhetoric
1