Classification
620 - Engineering & allied operations
720 - Architecture
140 - Specific philosophical schools
8
900 - History & geography
8
500 - Natural sciences & mathematics
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
3
400 - Language
3
540 - Chemistry & allied sciences
3
590 - Animals (Zoology)
3
333 - Economics of land & energy
2
340 - Law
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
300 - Social sciences
1
320 - Political science
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1