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