Classification
000 - Computer science, information & general works
6
140 - Specific philosophical schools
5
170 - Ethics
300 - Social sciences
3
320 - Political science
4
330 - Economics
4
333 - Economics of land & energy
6
340 - Law
4
361 - Social problems & social welfare in general
1
363 - Other social problems & services
5
370 - Education
2
380 - Commerce, communications & transportation
4
400 - Language
1
530 - Physics
1
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
1
600 - Technology
9
610 - Medicine & health
5
620 - Engineering & allied operations
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
6
720 - Architecture
5
800 - Literature & rhetoric
2
900 - History & geography