Classification
140 - Specific philosophical schools
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
570 - Life sciences; biology
2
600 - Technology
2
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
900 - History & geography
1