Classification
610 - Medicine & health
600 - Technology
5
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
2
330 - Economics
2
380 - Commerce, communications & transportation
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
900 - History & geography
1