Classification
630 - Agriculture & related technologies
000 - Computer science, information & general works
16
600 - Technology
16
700 - The arts; fine & decorative arts
12
330 - Economics
11
363 - Other social problems & services
11
580 - Plants (Botany)
11
333 - Economics of land & energy
10
610 - Medicine & health
9
620 - Engineering & allied operations
8
551 - Geology, hydrology & meteorology
7
320 - Political science
6
380 - Commerce, communications & transportation
5
581 - Specific topics in natural history
5
900 - History & geography
4
300 - Social sciences
3
304 - Factors affecting social behavior
3
612 - Human physiology
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
340 - Law
2
338 - Production
1
350 - Public administration & military science
1
370 - Education
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
657 - Accounting
1
658 - General management
1
720 - Architecture
1