Classification
551 - Geology, hydrology & meteorology
610 - Medicine & health
700 - The arts; fine & decorative arts
14
330 - Economics
13
363 - Other social problems & services
13
000 - Computer science, information & general works
12
333 - Economics of land & energy
11
600 - Technology
11
620 - Engineering & allied operations
8
380 - Commerce, communications & transportation
7
140 - Specific philosophical schools
6
320 - Political science
5
630 - Agriculture & related technologies
5
580 - Plants (Botany)
4
658 - General management
4
340 - Law
3
370 - Education
3
581 - Specific topics in natural history
2
720 - Architecture
2
900 - History & geography
2
170 - Ethics
1
360 - Social problems & services; associations
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
576 - Genetics & evolution
1
612 - Human physiology
1
657 - Accounting
1