Classification
363 - Other social problems & services
530 - Physics
600 - Technology
333 - Economics of land & energy
6
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
5
000 - Computer science, information & general works
4
500 - Natural sciences & mathematics
3
900 - History & geography
3
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
550 - Earth sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
650 - Management & auxiliary services
1