Classification
333 - Economics of land & energy
340 - Law
500 - Natural sciences & mathematics
700 - The arts; fine & decorative arts
13
000 - Computer science, information & general works
9
600 - Technology
9
620 - Engineering & allied operations
9
530 - Physics
8
900 - History & geography
8
380 - Commerce, communications & transportation
6
330 - Economics
5
576 - Genetics & evolution
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
400 - Language
2
414 - Phonology & phonetics
2
580 - Plants (Botany)
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
300 - Social sciences
1
320 - Political science
1
370 - Education
1
540 - Chemistry & allied sciences
1
590 - Animals (Zoology)
1