Classification
632 - Plant injuries, diseases & pests
31
610 - Medicine & health
30
580 - Plants (Botany)
18
000 - Computer science, information & general works
17
363 - Other social problems & services
17
668 - Technology of other organic products
15
700 - The arts; fine & decorative arts
11
628 - Sanitary & municipal engineering
10
333 - Economics of land & energy
8
630 - Agriculture & related technologies
8
600 - Technology
7
615 - Pharmacology & therapeutics
7
140 - Specific philosophical schools
6
540 - Chemistry & allied sciences
6
581 - Specific topics in natural history
6
330 - Economics
5
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
4
304 - Factors affecting social behavior
3
574 - [Unassigned]
3
631 - Techniques, equipment & materials
3
660 - Chemical engineering
3
900 - History & geography
3
570 - Life sciences; biology
2
576 - Genetics & evolution
2
614 - Incidence & prevention of disease
2
616 - Diseases
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
344 - Labor, social, education & cultural law
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
542 - Techniques, equipment & materials
1
543 - Analytical chemistry
1
634 - Orchards, fruits & forestry
1
674 - Lumber processing, wood products & cork
1
720 - Architecture
1