Classification
363 - Other social problems & services
551 - Geology, hydrology & meteorology
600 - Technology
4
620 - Engineering & allied operations
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
612 - Human physiology
1