Classification
576 - Genetics & evolution
580 - Plants (Botany)
600 - Technology
6
620 - Engineering & allied operations
630 - Agriculture & related technologies
333 - Economics of land & energy
5
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
900 - History & geography
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
720 - Architecture
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1
320 - Political science
1
330 - Economics
1
770 - Photography, photographs & computer art
1