Classification
610 - Medicine & health
329
363 - Other social problems & services
168
330 - Economics
150
700 - The arts; fine & decorative arts
105
658 - General management
90
600 - Technology
75
620 - Engineering & allied operations
73
000 - Computer science, information & general works
71
333 - Economics of land & energy
59
900 - History & geography
54
368 - Insurance
53
380 - Commerce, communications & transportation
52
140 - Specific philosophical schools
43
580 - Plants (Botany)
36
551 - Geology, hydrology & meteorology
33
500 - Natural sciences & mathematics
32
320 - Political science
29
332 - Financial economics
26
540 - Chemistry & allied sciences
21
615 - Pharmacology & therapeutics
21
338 - Production
20
628 - Sanitary & municipal engineering
19
331 - Labor economics
18
576 - Genetics & evolution
17
300 - Social sciences
15
570 - Life sciences; biology
15
005 - Computer programming, programs & data
14
100 - Philosophy & psychology
14
170 - Ethics
12
370 - Education
12
630 - Agriculture & related technologies
12
340 - Law
10
581 - Specific topics in natural history
10
304 - Factors affecting social behavior
9
339 - Macroeconomics & related topics
9
616 - Diseases
8
632 - Plant injuries, diseases & pests
8
670 - Manufacturing
8
362 - Social welfare problems & services
6
660 - Chemical engineering
6
302 - Social interaction
5
364 - Criminology
5
519 - Probabilities & applied mathematics
5
800 - Literature & rhetoric
5
361 - Social problems & social welfare in general
4
200 - Religion
3
381 - Commerce
3
400 - Language
3
510 - Mathematics
3
530 - Physics
3
more ...