Classification
363 - Other social problems & services
400 - Language
600 - Technology
10
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
900 - History & geography
6
140 - Specific philosophical schools
5
380 - Commerce, communications & transportation
5
000 - Computer science, information & general works
4
330 - Economics
4
333 - Economics of land & energy
4
370 - Education
4
580 - Plants (Botany)
3
340 - Law
2
500 - Natural sciences & mathematics
2
720 - Architecture
2
300 - Social sciences
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1