Classification
330 - Economics
125
700 - The arts; fine & decorative arts
42
600 - Technology
35
000 - Computer science, information & general works
34
363 - Other social problems & services
34
628 - Sanitary & municipal engineering
29
547 - Organic chemistry
26
333 - Economics of land & energy
25
620 - Engineering & allied operations
24
610 - Medicine & health
20
541 - Physical chemistry
19
900 - History & geography
19
665 - Industrial oils, fats, waxes & gases
14
540 - Chemistry & allied sciences
13
551 - Geology, hydrology & meteorology
13
576 - Genetics & evolution
13
580 - Plants (Botany)
13
660 - Chemical engineering
13
140 - Specific philosophical schools
10
380 - Commerce, communications & transportation
10
661 - Industrial chemicals
9
662 - Explosives, fuels & related products
9
530 - Physics
6
668 - Technology of other organic products
6
615 - Pharmacology & therapeutics
5
622 - Mining & related operations
5
414 - Phonology & phonetics
4
553 - Economic geology
4
304 - Factors affecting social behavior
3
320 - Political science
3
500 - Natural sciences & mathematics
3
543 - Analytical chemistry
3
546 - Inorganic chemistry
3
574 - [Unassigned]
3
581 - Specific topics in natural history
3
616 - Diseases
3
621 - Applied physics
3
632 - Plant injuries, diseases & pests
3
650 - Management & auxiliary services
3
300 - Social sciences
2
301 - Sociology & anthropology
2
340 - Law
2
370 - Education
2
612 - Human physiology
2
630 - Agriculture & related technologies
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
930 - History of ancient world to ca. 499
2
338 - Production
1
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