Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
530 - Physics
700 - The arts; fine & decorative arts
333 - Economics of land & energy
6
540 - Chemistry & allied sciences
3
610 - Medicine & health
3
330 - Economics
2
370 - Education
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
658 - General management
2
300 - Social sciences
1
304 - Factors affecting social behavior
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1
900 - History & geography
1