Classification
000 - Computer science, information & general works
320 - Political science
363 - Other social problems & services
540 - Chemistry & allied sciences
700 - The arts; fine & decorative arts
3
330 - Economics
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
300 - Social sciences
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1