Classification
333 - Economics of land & energy
3
363 - Other social problems & services
400 - Language
700 - The arts; fine & decorative arts
300 - Social sciences
2
330 - Economics
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
200 - Religion
1
301 - Sociology & anthropology
1
320 - Political science
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1