Classification
330 - Economics
270
320 - Political science
214
610 - Medicine & health
177
700 - The arts; fine & decorative arts
95
340 - Law
83
000 - Computer science, information & general works
70
360 - Social problems & services; associations
64
333 - Economics of land & energy
62
600 - Technology
61
620 - Engineering & allied operations
45
580 - Plants (Botany)
35
900 - History & geography
33
540 - Chemistry & allied sciences
31
363 - Other social problems & services
30
380 - Commerce, communications & transportation
28
140 - Specific philosophical schools
25
640 - Home & family management
25
576 - Genetics & evolution
20
160 - Logic
16
615 - Pharmacology & therapeutics
15
100 - Philosophy & psychology
14
547 - Organic chemistry
12
300 - Social sciences
11
370 - Education
10
414 - Phonology & phonetics
10
612 - Human physiology
10
500 - Natural sciences & mathematics
9
530 - Physics
8
541 - Physical chemistry
8
664 - Food technology
8
200 - Religion
7
362 - Social welfare problems & services
6
570 - Life sciences; biology
6
660 - Chemical engineering
6
304 - Factors affecting social behavior
5
630 - Agriculture & related technologies
5
170 - Ethics
4
663 - Beverage technology
4
800 - Literature & rhetoric
4
581 - Specific topics in natural history
3
616 - Diseases
3
668 - Technology of other organic products
3
301 - Sociology & anthropology
2
543 - Analytical chemistry
2
551 - Geology, hydrology & meteorology
2
572 - Biochemistry
2
628 - Sanitary & municipal engineering
2
650 - Management & auxiliary services
2
658 - General management
2
661 - Industrial chemicals
2
more ...