Classification
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
720 - Architecture
500 - Natural sciences & mathematics
3
000 - Computer science, information & general works
2
380 - Commerce, communications & transportation
2
400 - Language
2
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
410 - Linguistics
1
900 - History & geography
1