Classification
333 - Economics of land & energy
576 - Genetics & evolution
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
6
600 - Technology
5
620 - Engineering & allied operations
4
900 - History & geography
4
500 - Natural sciences & mathematics
2
580 - Plants (Botany)
2
140 - Specific philosophical schools
1
330 - Economics
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
530 - Physics
1
540 - Chemistry & allied sciences
1