Classification
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
000 - Computer science, information & general works
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1