Classification
380 - Commerce, communications & transportation
7
410 - Linguistics
333 - Economics of land & energy
5
000 - Computer science, information & general works
4
330 - Economics
4
363 - Other social problems & services
4
600 - Technology
4
320 - Political science
3
576 - Genetics & evolution
3
620 - Engineering & allied operations
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
140 - Specific philosophical schools
2
370 - Education
2
500 - Natural sciences & mathematics
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
160 - Logic
1
400 - Language
1
580 - Plants (Botany)
1
610 - Medicine & health
1
658 - General management
1