Classification
000 - Computer science, information & general works
10
580 - Plants (Botany)
10
610 - Medicine & health
9
620 - Engineering & allied operations
8
600 - Technology
7
630 - Agriculture & related technologies
7
333 - Economics of land & energy
6
363 - Other social problems & services
5
700 - The arts; fine & decorative arts
5
380 - Commerce, communications & transportation
4
330 - Economics
3
100 - Philosophy & psychology
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
658 - General management
1
800 - Literature & rhetoric
1
900 - History & geography
1