Classification
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
7
363 - Other social problems & services
7
580 - Plants (Botany)
7
600 - Technology
7
630 - Agriculture & related technologies
6
330 - Economics
5
333 - Economics of land & energy
4
620 - Engineering & allied operations
4
900 - History & geography
4
320 - Political science
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
350 - Public administration & military science
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
612 - Human physiology
1
650 - Management & auxiliary services
1