Classification
540 - Chemistry & allied sciences
000 - Computer science, information & general works
385
700 - The arts; fine & decorative arts
361
600 - Technology
344
620 - Engineering & allied operations
270
333 - Economics of land & energy
257
610 - Medicine & health
245
363 - Other social problems & services
181
580 - Plants (Botany)
105
900 - History & geography
90
500 - Natural sciences & mathematics
86
140 - Specific philosophical schools
82
330 - Economics
82
380 - Commerce, communications & transportation
74
576 - Genetics & evolution
68
530 - Physics
49
414 - Phonology & phonetics
40
630 - Agriculture & related technologies
40
581 - Specific topics in natural history
31
551 - Geology, hydrology & meteorology
30
615 - Pharmacology & therapeutics
30
370 - Education
29
612 - Human physiology
29
304 - Factors affecting social behavior
24
320 - Political science
18
720 - Architecture
17
800 - Literature & rhetoric
16
340 - Law
11
300 - Social sciences
10
100 - Philosophy & psychology
9
590 - Animals (Zoology)
9
301 - Sociology & anthropology
7
400 - Language
5
629 - Other branches of engineering
4
658 - General management
4
520 - Astronomy & allied sciences
3
361 - Social problems & social welfare in general
2
657 - Accounting
2
660 - Chemical engineering
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
331 - Labor economics
1
410 - Linguistics
1
510 - Mathematics
1
542 - Techniques, equipment & materials
1
547 - Organic chemistry
1
650 - Management & auxiliary services
1
791 - Public performances
1