Classification
140 - Specific philosophical schools
333 - Economics of land & energy
600 - Technology
5
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
330 - Economics
3
900 - History & geography
3
000 - Computer science, information & general works
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
200 - Religion
1
300 - Social sciences
1
320 - Political science
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
657 - Accounting
1
780 - Music
1
800 - Literature & rhetoric
1