Classification
620 - Engineering & allied operations
600 - Technology
164
630 - Agriculture & related technologies
127
580 - Plants (Botany)
86
000 - Computer science, information & general works
75
700 - The arts; fine & decorative arts
75
363 - Other social problems & services
65
333 - Economics of land & energy
57
610 - Medicine & health
51
900 - History & geography
46
330 - Economics
31
551 - Geology, hydrology & meteorology
25
581 - Specific topics in natural history
21
380 - Commerce, communications & transportation
18
414 - Phonology & phonetics
18
500 - Natural sciences & mathematics
18
576 - Genetics & evolution
18
140 - Specific philosophical schools
13
540 - Chemistry & allied sciences
12
720 - Architecture
12
320 - Political science
9
340 - Law
9
300 - Social sciences
8
770 - Photography, photographs & computer art
8
612 - Human physiology
6
658 - General management
6
170 - Ethics
3
302 - Social interaction
3
304 - Factors affecting social behavior
3
370 - Education
3
100 - Philosophy & psychology
2
410 - Linguistics
2
547 - Organic chemistry
2
632 - Plant injuries, diseases & pests
2
657 - Accounting
2
660 - Chemical engineering
2
662 - Explosives, fuels & related products
2
800 - Literature & rhetoric
2
005 - Computer programming, programs & data
1
336 - Public finance
1
384 - Communications; telecommunication
1
590 - Animals (Zoology)
1
621 - Applied physics
1
631 - Techniques, equipment & materials
1
745 - Decorative arts
1
781 - General principles & musical forms
1