Classification
140 - Specific philosophical schools
300 - Social sciences
320 - Political science
380 - Commerce, communications & transportation
330 - Economics
3
600 - Technology
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1