Classification
600 - Technology
11
620 - Engineering & allied operations
11
700 - The arts; fine & decorative arts
8
900 - History & geography
5
140 - Specific philosophical schools
4
333 - Economics of land & energy
4
610 - Medicine & health
4
000 - Computer science, information & general works
3
330 - Economics
2
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
630 - Agriculture & related technologies
1