Classification
000 - Computer science, information & general works
330 - Economics
363 - Other social problems & services
600 - Technology
10
620 - Engineering & allied operations
900 - History & geography
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
5
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
3
658 - General management
3
720 - Architecture
3
320 - Political science
2
400 - Language
2
576 - Genetics & evolution
2
340 - Law
1
370 - Education
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
800 - Literature & rhetoric
1