Classification
610 - Medicine & health
620 - Engineering & allied operations
468
600 - Technology
325
700 - The arts; fine & decorative arts
233
900 - History & geography
193
333 - Economics of land & energy
145
000 - Computer science, information & general works
123
363 - Other social problems & services
119
580 - Plants (Botany)
104
330 - Economics
83
630 - Agriculture & related technologies
78
140 - Specific philosophical schools
74
380 - Commerce, communications & transportation
56
540 - Chemistry & allied sciences
38
576 - Genetics & evolution
36
500 - Natural sciences & mathematics
33
320 - Political science
32
370 - Education
28
551 - Geology, hydrology & meteorology
27
720 - Architecture
23
100 - Philosophy & psychology
22
414 - Phonology & phonetics
21
658 - General management
17
300 - Social sciences
16
170 - Ethics
14
581 - Specific topics in natural history
14
340 - Law
12
400 - Language
12
615 - Pharmacology & therapeutics
11
800 - Literature & rhetoric
11
612 - Human physiology
9
304 - Factors affecting social behavior
8
530 - Physics
8
410 - Linguistics
7
361 - Social problems & social welfare in general
6
301 - Sociology & anthropology
3
306 - Culture & institutions
3
384 - Communications; telecommunication
3
657 - Accounting
3
780 - Music
3
297 - Islam, Babism & Bahai Faith
2
338 - Production
2
360 - Social problems & services; associations
2
621 - Applied physics
2
660 - Chemical engineering
2
120 - Epistemology, causation & humankind
1
200 - Religion
1
331 - Labor economics
1
364 - Criminology
1
519 - Probabilities & applied mathematics
1
more ...