Classification
300 - Social sciences
581 - Specific topics in natural history
330 - Economics
4
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
200 - Religion
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
576 - Genetics & evolution
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
340 - Law
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1