Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
320 - Political science
330 - Economics
700 - The arts; fine & decorative arts
20
333 - Economics of land & energy
16
363 - Other social problems & services
16
551 - Geology, hydrology & meteorology
12
380 - Commerce, communications & transportation
10
600 - Technology
10
610 - Medicine & health
10
581 - Specific topics in natural history
6
630 - Agriculture & related technologies
6
370 - Education
5
900 - History & geography
5
576 - Genetics & evolution
4
620 - Engineering & allied operations
4
304 - Factors affecting social behavior
3
580 - Plants (Botany)
3
658 - General management
3
720 - Architecture
3
297 - Islam, Babism & Bahai Faith
2
300 - Social sciences
2
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
657 - Accounting
2
100 - Philosophy & psychology
1
170 - Ethics
1
301 - Sociology & anthropology
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1