Classification
610 - Medicine & health
611
700 - The arts; fine & decorative arts
578
000 - Computer science, information & general works
518
600 - Technology
432
620 - Engineering & allied operations
343
333 - Economics of land & energy
334
580 - Plants (Botany)
321
540 - Chemistry & allied sciences
260
363 - Other social problems & services
193
900 - History & geography
161
140 - Specific philosophical schools
158
380 - Commerce, communications & transportation
132
330 - Economics
111
576 - Genetics & evolution
100
547 - Organic chemistry
95
630 - Agriculture & related technologies
82
615 - Pharmacology & therapeutics
76
414 - Phonology & phonetics
72
612 - Human physiology
68
570 - Life sciences; biology
56
581 - Specific topics in natural history
52
500 - Natural sciences & mathematics
46
572 - Biochemistry
44
304 - Factors affecting social behavior
42
660 - Chemical engineering
39
530 - Physics
37
551 - Geology, hydrology & meteorology
34
616 - Diseases
32
800 - Literature & rhetoric
27
628 - Sanitary & municipal engineering
25
664 - Food technology
25
541 - Physical chemistry
22
720 - Architecture
21
668 - Technology of other organic products
19
546 - Inorganic chemistry
17
370 - Education
15
543 - Analytical chemistry
14
574 - [Unassigned]
14
340 - Law
12
658 - General management
12
361 - Social problems & social welfare in general
11
632 - Plant injuries, diseases & pests
11
571 - Physiology & related subjects
10
621 - Applied physics
10
100 - Philosophy & psychology
7
590 - Animals (Zoology)
7
320 - Political science
5
579 - Microorganisms, fungi & algae
5
631 - Techniques, equipment & materials
5
410 - Linguistics
4
more ...