Classification
540 - Chemistry & allied sciences
000 - Computer science, information & general works
374
700 - The arts; fine & decorative arts
327
333 - Economics of land & energy
228
600 - Technology
225
610 - Medicine & health
225
620 - Engineering & allied operations
190
363 - Other social problems & services
162
580 - Plants (Botany)
89
900 - History & geography
86
140 - Specific philosophical schools
82
500 - Natural sciences & mathematics
69
380 - Commerce, communications & transportation
68
330 - Economics
67
576 - Genetics & evolution
64
530 - Physics
49
414 - Phonology & phonetics
37
615 - Pharmacology & therapeutics
31
551 - Geology, hydrology & meteorology
28
581 - Specific topics in natural history
28
370 - Education
27
612 - Human physiology
27
630 - Agriculture & related technologies
27
304 - Factors affecting social behavior
24
800 - Literature & rhetoric
17
720 - Architecture
15
320 - Political science
12
100 - Philosophy & psychology
8
300 - Social sciences
8
340 - Law
8
590 - Animals (Zoology)
8
301 - Sociology & anthropology
6
520 - Astronomy & allied sciences
5
400 - Language
4
629 - Other branches of engineering
4
410 - Linguistics
3
658 - General management
3
361 - Social problems & social welfare in general
2
657 - Accounting
2
660 - Chemical engineering
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
331 - Labor economics
1
510 - Mathematics
1
542 - Techniques, equipment & materials
1
547 - Organic chemistry
1
650 - Management & auxiliary services
1