Classification
000 - Computer science, information & general works
600 - Technology
4
380 - Commerce, communications & transportation
3
333 - Economics of land & energy
2
370 - Education
2
500 - Natural sciences & mathematics
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
170 - Ethics
1
300 - Social sciences
1
303 - Social processes
1
320 - Political science
1
330 - Economics
1
331 - Labor economics
1
340 - Law
1
363 - Other social problems & services
1
364 - Criminology
1
400 - Language
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
658 - General management
1