Classification
000 - Computer science, information & general works
320 - Political science
361 - Social problems & social welfare in general
363 - Other social problems & services
140 - Specific philosophical schools
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
200 - Religion
2
330 - Economics
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
301 - Sociology & anthropology
1
340 - Law
1
580 - Plants (Botany)
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1