Classification
330 - Economics
551 - Geology, hydrology & meteorology
600 - Technology
620 - Engineering & allied operations
630 - Agriculture & related technologies
363 - Other social problems & services
14
333 - Economics of land & energy
11
000 - Computer science, information & general works
10
700 - The arts; fine & decorative arts
9
610 - Medicine & health
7
580 - Plants (Botany)
6
320 - Political science
4
380 - Commerce, communications & transportation
3
581 - Specific topics in natural history
3
340 - Law
2
658 - General management
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
720 - Architecture
1
900 - History & geography
1