Classification
363 - Other social problems & services
600 - Technology
720 - Architecture
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
320 - Political science
1
330 - Economics
1
370 - Education
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1
900 - History & geography
1