Classification
363 - Other social problems & services
410 - Linguistics
330 - Economics
4
320 - Political science
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
800 - Literature & rhetoric
3
140 - Specific philosophical schools
2
340 - Law
2
400 - Language
2
600 - Technology
2
610 - Medicine & health
2
900 - History & geography
2
100 - Philosophy & psychology
1
200 - Religion
1
370 - Education
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
658 - General management
1
700 - The arts; fine & decorative arts
1